If you interview at a traditional tech company, you go through 5-8 interviews in a day. If somebody were to review, say, around 4 of these packets every week, they see about 20-30 interviews every week. That's ~1000-1500 a year. The 5K mark comes faster than you think.

And if you work at a company that size, changing the interview process is a bit more work than "oh, we just won't do that".

Not everybody works at a small startup.