seeing as how ai is basically just predictive text tuned up to 11 my guess on that is actually that theres likely a lot of text online about not going to the ER if you dont really have to, because cost/not flooding the system/etc
I'd guess it's a bit of both, regurgitating the advice about not going to the ER if you can avoid it, plus spitting in a bit of advice for less urgent joint problems or what the ER would suggest as follow up instructions.