Stupidity drives the ignorant to claim no fraud occurred because few cases have made it into court against democrat obstruction. It is very difficult or even impossible to prove corrupted voting machines corrupted the vote totals in key precincts, especially since democrats refuse to allow non-democrat investigators to examine the machines (for obviously suspicious reasons.)
Democrats claim voting machines that have been examined by non-democrats are corrupted. The only pure and untainted machines, according to democrats, are those completely controlled and operated by democrats without any interference from republican observers or investigators, yet all voting machines are known to be susceptible to fraudulent manipulation. Go figure.