there’s nothing wrong with this opinion, attitude, what have you. it is useful. important. not every project gets a clean start. not everyone that starts a project sees it through.
my preference is making my own mess and iterating it out of one. decreases the hunt for bodies. but preference doesn’t always equate to reality.
also depends on the project. if there’s a delightfully boring industry standard for most needs, starting from nothing results in a cleaner product. starting with an existing, misguided implementation is just greenfield with extra steps.