I once read an essay on how people often believe that to be good at something you have to spend a lot of time theorizing about it. I think the example they used was painting or pottery or something: someone who spends 1 year thinking about the perfect pot and then makes it, vs someone who spends 1 year making pots. I was convinced and kept in mind ever since.

But I hadn't until now seen the connection to speed spelled out. Of course, to try a lot you have to be fast at each attemp.