Is consciously rejecting deliberately addictive short-form content and sacrificing convenience in favour of purpose not a sign of self control and discipline?

I've often thought the same as you wrote in your comment, but my inner contrarian just gave me an answer.

I think it takes discipline to accept that it's impossible (for you) to "purposefully" use short form content and choose the higher-friction option of single purpose devices. The discipline just happens at a higher level, where the Pavlovian temptation to scroll hasn't kicked in yet.

For some reason, that option is commonly seen as lack of self control. Perhaps that is true in the literal definition of the word, but I'd argue (since the result is the same - less time wasted) that it's equal to not scrolling when you have a phone.

Granted, less drastic options are available. I've installed a lot of feed-blocking plugins and time limits (HN noprocrast) which works reasonably well for me.