That doesn't mean you can't think it's a bad idea to do so, even if it happens regularly...
No doubt, it might be shit! Case in point: actually rediscovering/bringing back Gallifrey in the first place was imo a terrible idea and a huge mistake, because whenever wider Time Lord Society crops up - especially the council, president, upper echelon etc - it's a bloody anchor around the show's neck. Boring ass dusty senators. Gallifrey's return gave us Heaven Sent, but that prison could've been built by Davros, or the Master, or whoever else, tbh.
But the idea of "how dare [showrunner] rewrite the continuity!" is nuts. Doctor Who is in a class of its own when it comes to retcons and rewrites. It literally does not matter at all.