>>2855686D7000 isn't really comparable to the 7D in build, the Nikon equivalent would be a D300 or D500. The D300 is a full magnesium chassis and the D500 is magnesium and CFRP.
Also Nikon has lately started making portions of newer bodies out of CFRP rather than magnesium. It's a composite material which is far from what you would probably think of when you hear the word "plastic"
>>2855687That filename is wrong by the way. That's definitely a D7000, pic related is a D700.
I'm not going to argue anything about which company makes sturdier cameras or anything though because there's no way to prove anything except for a bunch of anecdotes. Maybe you're right that Canon is better, I don't know.