Past a certain point there are no "simple code changes" anymore. Automation and functional QA needs to ensure zero regressions, internal and external docs need to be considered, it all needs to be bundled in with many other code changes (feature and fixes), etc. There is no shortcut. Even FB had to dial back their "break shit in prod" mantra.
Of course startup devs hate this, real men fuck around in production, which is great. Running and maintaining a large code base is very grown up sport, more like running a country than building a house. For those on the other side, who inherit startup code and have to fold it in ... the hatred is mutual.