Only give your scrolls to spell-casters.
Don't swap out prepared spells on the fly.
Don't spam Long Rests.
Put 13s in multi-class stats.
Don't throw potions.
All of these things are things that you do.
If following D&D rules is important to you, then why don't you abide by them?
I pretty much agree with what Alodar says, the only exception might be throwing potions since NPCs also do it, so if you avoid using that mechanic you're putting yourself at a slight disadvantage. I personally really like this mechanic, if NPCs didn't use it and I did, I'd feel like I was cheating a bit and would probably stop, but since they do it's fair game.
Why do you think Ironman modes exist in games? By your logic players can just delete their saves themselves if they die.
His logic seems perfectly sound here, and I'm almost certain the origin of ironman mode literally comes from community challenges in which players used self-imposed restrictions and manually deleted their saves when they failed. I know there are at least a couple streamers that do these challenge runs in BG1 and 2, and those games don't have an actual ironman mode.
It also means that you have to remember a thousand little things at all time, which you can not do for this or that reason, instead of the game taking that annoyance from you, and just preventing you from doing it.
If the things we're talking about are meaningful enough they surely aren't that easily forgotten.
If you want to compare having the burden of simply stoping yourself from doing things you don't want to do, with outright removing options that some people might enjoy, the former is clearly the lesser evil. In cases like this, some of you people should just work on your own willpower instead of demanding the world to limit our options just so they align with how you personally like to play.
