There's a new strand on this thread in which people find their own names offensive? Peculiar. Still, whatever floats your boat.
I'm frequently, in a professional context, referred to by surname only with no title. Doubtless some would find that 'offensive' too, but in my line of work it's standard practice and no one complains that it's an issue. Should my pharmacist call out my name in a similar format, I wouldn't be remotely bothered.
As for addressing someone by their first given name being 'rude', in the 1950s and 60s, perhaps. But disappointing though it may be for those who are offended by their own names, this is increasingly standard practice and that includes by the medical procession.
If over-familiarity is the issue with given names then 'love', 'darling', 'sweetheart' (oddly enough all reserved for women) obviously won't cut it, either. Nor will the only-slightly-preferable 'mate', 'duck', or 'oi!'
I've been called all of the above at some time or other, too. Sometimes they might be said in genuine friendliness. But most of the time, the three former have one purpose only and it's the same purpose as the silly differentiation in title.
To put women back in their box.