Not flaming, stating fact. You look at one point and ignore the rest of what that person has to say altogether. You only think with what you've been shown and not outside of your limitations.
And yes, it will. It's pressure. Though a CPU is nothing like a human, having them constantly on you is a pain. The awful habits that you speak of only apply if a person constantly does that. Chances are, before someone's first tournament, they'll have played some human friends and know very well what the difference between human and CPU. Those who do not automatically will not get far, and if they consistently go, not realizing that one fact, it's just extra money in the pot for the winners.
He's talking about the basics, not the advanced half. I'm not going to pick up Donkey Kong, play with him in SSE Intense, and expect to figure anything out, but I'll definitely learn what attack does how much damage, the range of said attack, how much DK can take before being flown out (not the best judgment in SSE, but a minor one that can help to a certain degree), and also how high he can jump with all three (assuming there is a third (which with DK we know there is)), his recovery rate, and his size in proportion to our main character (for me, in proportion to Zelda).
Basics are everything. ATs only improve and improvise upon the basics.