It'd be easy to undercut the airlines by starting a company that eschews safety regulations.
It'd be easy to undercut the banks by starting a company that eschews financial regulations.
It'd be easy to undercut a doctor by offering services by unlicensed medical staff that don't follow medical guidelines.
There are lots of businesses that would be more affordable to the poor if they didn't have any regulation at all.
Reasonable regulation is not a bad thing, it ensures that consumers are getting what they paid for and that they aren't being exploited. Like, giving the customer a $500 loan at 300% interest that they may never be able to pay back so they end up in an endless cycle of debt.