When you do something slow, you are able to do it well, and eventually it becomes muscle memory, then you are able to do it fast.
No, the more times you do it the more times it becomes muscle memory. Doing it slow means you won't do it as much. Doing it slow is only learning how to do it in the first place, but not necessarily at doing it fast. This is why alot of these pros do the puzzle rush. Its also what these kids are doing nowadays to improve their "muscle memory" Playing classical is literally the opposite of what you want to achieve imo.
The problem with not doing it right, but doing it repeatedly, is that your "muscle memory" has become a hard habit to break. Blitz reinforces error.
Not only is it conventional wisdom, but it's just common sense.
If you want to be fast and accurate, you first have to practice being slow and accurate... that's not just chess that's anything.
practice being slow to be fast? Thats the opposite of common sense. To reference Christopher Yoo again. He developed his fast intution, pattern recognition, etc by doing puzzle rush bud. not playing classical lol.
I will have to disagree. Many other sports require you to be accurate slow first, before being accurate fast. I took piano lessons for about 6 years; my teacher(s) (two) both constantly told me to slow down, since when I played fast I Was missing notes.
When I played soccer, when our coach would teach us a new technique, he would first show us, and we would go through the motion slowly. Slowly, many times, before speeding it up.
"Why does slowing down work so well? ... First, going slow allows you to attend more closely to errors, creating a higher degree of precision...
As Tom Martinez likes to say, 'It's not how fast you can do it, it's how slow you can do it correctly.'
Second, going slow helps the practicer to develop something more important: A working perception of the skill's internal blueprints."
-Daniel Coyle, "The Talent Code"