First, sorry. I was probably needlessly aggressive, I've heard similar words from everyone around me all my life and I may have assumed you were being similarly dismissive and gotten a bit angry.
I'm not saying you have to use commitment devices forever, but it's a great starting point. When one is deep into their faulty harmful behaviors, it's hard to have the mental energy to practice mindfulness and take a step back and exercise any sort of control over one's impulses. Maybe nine of out of ten times you may be successful in practicing mindfulness, but commitment devices[0] help you prevent that 1/10 from blowing your entire day up(or even week), precisely because they don't depend on your mental state at all. They let you precommit and make good decision for your future self when you are in a good state of mind, so you won't completely spiral down when you're in a bad state of mind. It's just another tool in the toolbox for dealing with ADHD.
With that, I do agree. I encourage my peers to pull "hard stops" when they find that they are entrenched in their habits. For me, it was dropping social media, putting the "procrastination" timer on my HN profile, etc. But I always caution that if one doesn't gradually reintroduce the situations in which they struggled before, they will not have actually improved, just hidden themselves from failure.
I'm likewise sorry if I came off as dismissive, as that was never my goal. I was more concerned than anything. I am aware that a great deal of people downplay the impact of living with ADHD, and that can cause no end to frustration. This very thing led to me dropping out of college. However, I'd also like my easily-distracted brethren to see how they are empowered by their disability as well, and my goals were more to that end.
I'm not saying you have to use commitment devices forever, but it's a great starting point. When one is deep into their faulty harmful behaviors, it's hard to have the mental energy to practice mindfulness and take a step back and exercise any sort of control over one's impulses. Maybe nine of out of ten times you may be successful in practicing mindfulness, but commitment devices[0] help you prevent that 1/10 from blowing your entire day up(or even week), precisely because they don't depend on your mental state at all. They let you precommit and make good decision for your future self when you are in a good state of mind, so you won't completely spiral down when you're in a bad state of mind. It's just another tool in the toolbox for dealing with ADHD.
[0] https://www.wikiwand.com/en/Commitment_device