I worked for a company writing Elixir code several years ago. Prior to my arrival, the ignorant architect had deployed Elixir in a way that broke the BEAM (which he viewed as "old and deprecated"). Furthermore, one of the "staff" engineers—instead of using private functions as they're intended—created a pattern of SomePublicModule and SomePublicModule.Private, where he placed all the "private" functions in the SomePublicModule.Private module as public functions so that he could "test them."

I tried almost in vain to fix these two ridiculous decisions, but the company refused to let code fixes through the review process if they touched "well-established, stable code that has been thoroughly tested." After being there for a couple of years, the only thing I was able to fight through and fix was the BEAM issue, which ultimately cost me my job.

My point in all this is that, at least sometimes, it isn't good engineers writing silly code, but rather a combination of incompetent/ignorant engineers making stupid decisions, and company policies that prevent these terrible decisions from ever being fixed, so good engineers have no choice but to write bad code to compensate for the other bad code that was already cemented in place.