Sounds like the sunken cost fallacy in action.

I think experience is the biggest educator in the field, and one will be careful not to repeat a mistake, especially when it is a big one.

I think sunk cost fallacy can be quoted if someone messes up multiple times but they still don't want to let them go. Then the problem is nonchalance or incompetence.

The only people that don't make mistakes are the people that never do anything at all.

Trolley problem. First mistake could be to do nothing at all!

There are people who are very productive who make very few mistakes.

Just like there people who can snatch defeat from the jaws of victory nearly every time.

Few is not none, besides that those people who are very productive and that make very few mistakes usually also were younger when they were still learning and likely learned a lot from those mistakes so now you see the end product.

That is true, but realize that those are the people that stay in their comfort zone and repeat the things they already know.

Sunken cost in addition to replacement cost, where the latter may be higher than the former.