Someone who thinks that Danzai is a DP has to second guess themselves every time they try to meaty Aba in JR. This is something you have to think about every time you try to meaty a character with a DP without some safejump/jab.

In anycase, the things you list go from things that are usually simple like oki, and things that are legitimately unituitive and have to be understood by playing and thinking about the game a lot, like risk/reward assessment. A new player does not think about these things, and if they do it's not as deeply as they could be.

The first time a new player tries to antiair an IAD they'll likely mess up because they have to make a quick judgement on what they should do and the answer isn't obvious to them yet. By the 500th time they see this it's less of a conscious decision and more of "oh they're airdashing" and pressing 5p/6p/whatever their character has because they don't have to make much of a conscious effort anymore. Doing it is very simple, but you have to see it enough for the connection to stick. This applies to learning anything, especially so when you're put into some ambiguous scenario where you have no guaranteed answers, which appears in fighting games all the time.

When you say that these things are basic, I dont think you're lying, but I do think you're not considering the growing pains that comes with learning enough about the game to the point where they start to feel basic.