my guess is that most scaled "fraud" claims are fake and nearly all are hysterical which makes me not trust those claims.
however, its a serious problem for state legitimacy in a democracy that lots of people think elections are fake and this to me is underweighted by people focused on object level claims of fraud being mostly fake.
electoral fraud is a common problem both historically and contemporarily. it's not facially unreasonable for people to be concerned when elections are held in times of great civic tension, where they have zero trust for many of the people running those elections. simply telling people they're retarded for being concerned is not going to allay those concerns. yes obviously people are retarded but retards have an equal stake in our nation.
if you are concerned about people saying elections are being stolen, an alternative to telling them to shut up is to structure elections to a wife of caesar standard. maximize transparency and to the extent feasible auditibility.
of course if you have the ability to do THAT and you choose not to, that too is a signal. maybe it's a signal that you're doing something shady! maybe it's just a signal that you hold the complaints of voters in contempt. irrespective of which it is, maintaining a system that people openly distrust in spite of their complaints will cause them to rationally distrust you further.
in a sense it doesn't matter because my belief is that we are in the middle of a low-grade civil war and both parties will to the extent they're able do their best to steal elections using whatever means are available to them and neither party is interested in the long term legitimacy of the state, and nothing is likely to improve. enjoy arbys
I have to deal with people on the left coming up with stupid fraud theories too whenever they lose - they make videos, they make weird graphs, itโs all bullshit.
Your priors here are just totally out of whack - you should treat someone on either side claiming large scale fraud with the same skepticism that you would ESP.