No one is going to be welding an inch away from an epoxy bond.
The world was absolutely full of non-replaceable aluminum derailleur hangers at one time, and it really wasn't a big issue. Dropouts like that are much tougher than the soft stuff replaceable hangers are made from, and can take quite a bit more impact before bending. I hate replaceable hanger - they might as well be made of lead.
It isn't worth worrying about.