pepper: Find me a hobbyist who owns multiple copies of each tool, as well as multiple workshops to get his models done faster.
I can find you a dozen. I mean, i own serval soldering irons, i could get around with one yes, but certain jobs would take longer, or would be harder to complete.
As satchmo mentioned, he doesnt hurt anyone. And i got hobby's im willing to spend just as much money on, does that make me worse then him? No it doesnt, as long as people are not hurting anyone else then you should just let em be.