Earlier quoted context omitted.
Because all taxes are taxes on people. Corporate taxes are just a convoluted and bad way of doing so.
Are you proposing that eliminating corporate taxes would mean that somehow you would make more at the end of the day and be taxed less overall? I'm not sure I see that happening.
1. Probably also the employees would make more and the customers would pay less for products as well. This has to do with something called tax incidence.