What is strange is the exact same thing happened in the late 90's during the first bubble. In that case it was "webmaster" was the new thing and there were these sorts of boot camps that would turn you into a webmaster in just a few short weeks so you could take your place in the .com revolution. Massive numbers of those folks were doing that because they wanted more money per month and were trying any way they could to get it. They made for really bad web designers because they really didn't care about things and at the end of the day, coding is about caring and interest.
I have even felt this pain at a former employer who hired IS majors as devs. The only IS majors that tended hold there own was the ones with CS minors.
http://daemon.co.za/2014/04/introduction-fullstack-fundament...
Most people hiring wouldn't and it's pretty common to remove things from one's resume that are unrelated to the position applied for. It's expected, actually, as most people who are hiring don't want to waste time trying to sort qualifications from chuff.
Again, I'm hiring you holistically.. not your ability to program. I think especially if your ability to program is a new facet to your otherwise rich and interesting existence then you're hurting yourself not sharing more.
I just gave you one :) As far as legality, there's an enormous difference between wanting to know how someone approached and what they learned from a previous career (or school, or serious hobby, etc.) and crossing the line into discrimination. It's not that difficult.
Plus, if you hire a bootcamp grad, you're probably going to have to do lots of on-the-job training anyway. Good time to indoctrinate the candidate with the "right" way to do things in your particular codebase.
All of that said, I think there are plenty of rails shops and if you're from one of these camps you'll likely feel more confident & productive right away and your confidence and ability to ask the right questions will be paramount in your success in a first-coding position I think... so my advice would likely be to still maximize for your current strengths and try to stay in your burgeoning wheelhouse.
ONLY A GITHUB PROFILE
It seems pretty clear that the bootcamps told you we really care about your github profile, and that sometimes gets interpreted as "to the exclusion of everything else".
APPARENTLY BORN SIX MONTHS AGO
Related to the over-emphasis on github profiles is the exclusion of anything not-code related. I get that code bootcamps attract lots of folks who maybe got a political science degree or spent the last three years in real estate. Tell me that. I'd love to see what you've been up to, we're looking to hire you, not your ability to code. I hope these institutions aren't making folks feel like their past isn't valuable because it didn't involve Rails.
ALSO THE GITHUB PROFILE IS BORING
The profiles tend to have some code camp rails homework in them. It's hard to go from learning to code to having a github profile that's impressive in a short period of time (Hell, I've been working for well over a decade and my github profile isn't impressive!).. That said, if you do want me to care about your github profile I'd rather see signs of enthusiasm in the form of personal gists or projects or thoughtful bug reports or feature tickets on other projects.
DISGUISES THE CODE BOOTCAMP AFFILIATION
Seems like the elephant in the room on these things is where you've been learning to code and how you found us. Many of the resumes seem to avoid being transparent about this. I wanna know which bootcamp you did, what got you interested, and how it went.
THEY TOLD YOU TO EMAIL US
It's clear that we're on a list and plenty of candidates email us without knowing (or maybe caring) about what we do. That's a non-starter. Frankly, I doubt that the people who even put us on the list of shops to mail looked any closer than a crunch-base profile or Who's Hiring post on HN.
RAILS
The resumes I'm seeing clearly come from a bootcamp that emphasizes Rails and JS/HTML. That's great, but we're not a rails shop and the candidate is brand spanking new to this. It's probably better that you continue your investment in Rails before doing a wholesale dive into another platform.
At any rate, I love that camps like this exist. I've long thought our industry needs really good trade education to supplement CS programs which are focused and affordable ways to launch folks who are interested into software development. I just think the packaging and presentation of folks coming out of these things could use some work.