I have personally created several corporations in my time, and never once have I thought any of them to be separate “people” – if I had I would have been granting myself more than the “one man, one vote” concept of our Constitution and all related laws.
Now we have the Supreme Court allowing Corporations (and, yes, Labor Unions – also not separate “people”) the ability to spend unregulated amounts of money on elections… because they are “people” within the law.