C corps require more red-tape around day to day actions, and as a result are generally more expensive to operate.
What red tape? If it's basic accounting issues, that's true of any business. If it's c-corp specific paperwork, that takes an hour of my time once a year to submit the annual report to Delaware.
The regulatory stuff is just a pain in the ass compared to an LLC. It's mostly that simple.
In a nutshell, it is more complex & expensive to run a c-corp compared to, for example, a LLC. The way taxes are handled is a meaningful part of the issue.
Can’t deduct the expenses personally in a C Corp, which is a giant personal hit (you can with an S corp or LLC)