system
A chat on subreddit /r/me_irl
human
No, it's because they feel it isn't worth it and they'll figure it out on their own.  


It's not unheard for companies to go through high turn overs. I briefly worked for LG and they had a 96% turnover rate. But all they need is one or tow guys to start making that money.  


That or they run the place so lean they literally don't have anybody to train.
gpt
The other person was also correct. No one wants to invest in serious training because they are worried the person will leave. And some places, because they essentially expect people to leave (like what you experienced) they lean into it and just work people as hard/long as possible before they do leave.

At the very least, unions could help prevent this self-defeating mentality that some businesses have