[lolinder]

The large companies don't need tens of thousands of system architects. They need tens of thousands of coders who can do what they're told on small parts of a system without fussing too much about the bigger picture. I think that's what OP is referring to—leetcode filters for young developers who don't need to understand all the reasons why they're doing what they're doing.

[a10c]

Why would a well rounded senior developer be interviewing for a role that requires a code monkey?

[kodah]

No job is ever phrased as needing a code-monkey and no one wants to think of themselves as a primate doing a very specific task.

[jokethrowaway]

Why would you put out ads for senior engineers when you'll make them perform code monkey tasks?

[hiptobecubic]

Every job has random overhead and your productivity is boosted quite a lot by already being familiar with some random bullshit problem like "don't configure your test environment this way or you'll run out of file handles after a day or two." Hiring more experienced people means fewer delays due to issues like that, even for boring "code-monkey" work.