It may have been that my ears just seal better using foam than with the three flange oddity Etymotic puts on these?
I do agree the Etymotics sound better out of the box, but after using AutoEQ they sound pretty similar.
I've used the 7HZ Timeless, and it is an excellent IEM... But it doesn't match the ER4, for my use-case.
And in that case, the organisational tools are still helpful
Even for "normies" this is true. We all forget this. Medicine is often an art as much as a science.
As far as my ability to work to music... It beats office noise, and I have always had tinnitus, so... total silence is actually bad for me. Background noise saves me.
For a long time I thought I couldn't. Then I found lots of playlists of pretty good music. Try https://www.programmersmusic.com/ and see if any of those styles work for you.
Note, I now find that music helps me focus, but lessens my creativity. So I only sometimes use music.
Tools are useful in as much as they help you control your attention.
The only ones I've found truly useful are ER4SRs. (In ear monitors, -35DB to the environment. I listen to music while I work, at ~70DB. If you do the math about the only thing I can hear is a fire alarm... and that's about right. :) )