Eh.. I don't see that as insulting (I mean: at all)?
Sometimes you just don't know and have to rely on the reporter. Maybe some triagers are overactive in using it. E.g. closing just because of a new GNOME version isn't right. But if the bug is old and/or lots of new development happened in between, then it can be ok to ask if it still applies. But it is up to the triager/developer to make a judgement call.
Bugsquad decides entirely on how it is done in general for triagers. They used to ask the reporter and wait a while (e.g. 6 weeks, 3 months). But they noticed that often there was no feedback at all. So instead of leaving it open ("NEEDINFO"), they're closing it more quickly.
The reporter has the ability to reopen, so don't see anything wrong with this? It should say to please reopen, no?
Anyway, if you have suggestions on the stock answer, could you please email firstname.lastname@example.org (I tend to ignore LWN articles after a few days; hard to track if not a subscriber)? Or followup now and I'll mention it to them. Entire process change is better if you discuss directly (I'd just be a postman).