If HN and Reddit are any indication, if you post a link to a blog post, people will respond without reading it. People don't like switching domains, especially if they are browsing from an app. (Myself included)

Sure but that's not just being lazy, its also a learned habit. There's a great deal of blog posts (like most writing in general) that is 5% information and 95% fluff. Sometimes you want the art, sometimes (esp. the engineering mindset) you just want the information. Skipping to comments frequently yields this, often with bonus comments like "I'm an actual expert and that post is very innaccurate".

This. I frequently find myself skimming over HN comments on a submission before reading the article, because it provides a hint at whether reading the submission is actually worth my time.

Or in this case, the HN comments actually provide a more complete article/summary :-)

Also blogs often mean fancy HTML etc, something that rarely produce a good reading experience on mobile devices.

In my experience, twitter is one of the worst offenders here, with an exorbitant amount of HTML, Javascript and pop-ups just to prevent me from reading 140 characters.

Ironically, I find Facebook's webpage way better on mobile than their actual app. I believe their app may originally have been designed for cellphone battery endurance testing. After a bit of hacking, someone figured out it could access Facebook and they decided to release it as an app.