I can say, I have seen inserts back out. Buuuut, I have never had one back out that I installed myself. This is credited to a few things. Using the appropriate inserts for the material you’re inserting into. Using the CORRECT (not the closest size you can find) bit. Having a straight hole. And using the appropriate “gluing” agent if you so call for.
Inserts are tricky to master and if not done properly, you will have issues.