though I support your comments (since I'm a Nikon user
), I think the same comments about durability could be said of at least the Canon pro bodies and L lenses.
threadstarter doesn't have a lens collection spanning decades, so his camera choices are more varied.
My opinion is that most hobbyists tend to only have the kit lens (18-55, 18-70, 18-105, etc).
Additional purchases (if any) are likely to be limited to:
a) budget telephoto zoom (eg. 55-200, 70-300)
b) fast prime (eg. 35/1.8, 50/1.8)
c) ultra-wide (eg. 11-16, 12-24)
d) faster standard zoom (eg. 17-50/2.8)
e) macro
in such a case, most of the major camera manufacturers and 3rd party lens makers have products that fill this requirement.
So ultimately it boils down to how much one likes a certain brand (for features, price, brand reputation, etc). As li0nheart07 said, whether one buys Nike or Adidas is purely down to personal choice.