I've always considered 1500g to be a maximum weight. Like my old beater Helium's for everyday use. The light stuff was more 1100-1200.
Nowadays, between disc brakes and tubeless instead of tubulars wheels have gotten heavier. Even heavier when 29 wide became standard instead of 26 narrow.
I still don't think that 1500g is crazy light, just not heavy. They should hold up to your weight no problem.