EXACTLY! Because it's a known fact all devs make mistakes, and as such, as a product manager/owner you're responsible for the bigger picture of the product and ensuring the right requirements, checks and bound are put in palce and validated for a successful product release.
It's not the job of the lowly SW engineers who have little visibility in the product as a whole and who just sprint to punch out Jira tickets handed to them from above, to check your product works as intended, it's your job as a PM/PO to ensure the work of all the devs integrates nicely into a cohesive product as per the requirements/vision.
Kind of like that famous story of that intern who got fired for deleting the production DB by mistake on his first day. Was it the intern's fault for the mistake or the fault of all the seniors and managers who should have placed the proper checks and bounds in place so that nobody can so easily delete the production DB?
So the buck for the product success/fail stops with those at the top who orchestrate the band, not with the individual SW engineers at the bottom.