I would agree with that, my point of reference is from working the last 3 years at one of those and finding lots of mediocre engineers who bounce from team to t

I would agree with that, my point of reference is from working the last 3 years at one of those and finding lots of mediocre engineers who bounce from team to team or company to company every 12-18 months. They deliver, leave technical debt and move on. Its a facade of a good engineer and its hard to catch until you are the one cleaning up the mess or replacing the mess.