Yep. I once worked at a manufacturing company. Their clients sent order information via an FTP server. The orders were formatted as flat files, aka just simple text files. I had to create code that painsakingly looked through each format and imported it into the new ERP system. Every vendor was different in each flat file. I'm sure some had similarities, but abstracting the logic was more dangerous in this case.

A lot of business software is boring. It does not take skill to do. It only requires someone to know a handful of tools and be willing to put in the time. So my advice to non-FAANG developers: if you want to make development your career, learn to be bored. Still work on marketable skills, learn new languages, etc. But remember that not every task will be an interesting new technical issue, it's probably going to be something you've seen a hundred times before.