If they formed a normal coalition government, I would wholeheartedly agree with you. But they did not, and could not. They couldn't get 13% of the other 63% of people to side with them, even in exchange for shared political control!

And that 37% was brief and their biggest moment in light of absolute civil chaos including things like a 30% unemployment rate. 4 months later, elections were held again - elections that the Nazis were exceptionally optimistic about. They ended up going down to 33%. Then shenanigans started. There would be no more fair elections in Germany for nearly 2 decades.