Its a really dumb take once you apply it to other genres. I play strategy games a lot and I can't imagine forcing someone getting into something like TWW3 to learn like:
"Before you start playing, you should know the statline of every single Empire unit in your army and compare them to your opponent's units stats and as you can see your opponent's dwarfs have higher melee defence by 2 but lower melee attack by 5 which means you'll probably win however they also have high armour so if you do the math you're only dealing around 30% damage and you need to...."

Like, some people learn better when breaking things down into a raw numbers game, but other people are just gonna throw mean green Orcs into Chaos Warriors and see what happens, and that's totally fine. Or, in fighting game terms, I'm gonna mash after blocking a big punch from Sol and see what happens, and if it doesn't work I'll try something else.

Button mashing was what Fighting Games were most commonly associated with for me, so its weird hearing people stress about the exact opposite.

Wow, I tend to get panicky during burnout and do really dumb stuff, but to keep calm and react with such precision is insane!

Where are you finding the replays with inputs from? I know top 8s are usually streamed, but do they upload the replay files somewhere else or something?