Yeah, and a third party candidate could be voted into every seat and the presidency, but it's so stacked against it occurring, it's effectively impossible.
The state of the economy today is what's stopping a vast majority of people from doing so. You can open a coffee shop and survive, but you could never compete against Starbucks. You would not even dent their bottom line. You would need hundreds of millions of dollars to realistically compete. Capitalism has brought us to a point where a majority of folks need to sell their idea to investors, further separating most workers from the value of their work.
Edit: I'm really tired of the naive and childish defenses most people put up for capitalism. "Nothing is stopping you." Yeah and "nothing" is stopping a transgender women from becoming our next president by the same definition of "nothing". Might as well say nothing is stopping you from passing through walls as quantum mechanics says it's possible.