As for Swalwell himself, it wouldn’t be surprising that a guy in his position of power would use the imbalance to impose himself sexually on people of lesser power against their will. It’s a tale as old as time.
That said, there is a complicating factor with this one: any number of current Republicans have guns that smoke so much from their past, coupled with the credible allegations against people at the top of that party, that it’s very easy to connect dots to indict them; whereas here, the dot-connection feels more tenuous, and people may want to believe these allegations simply because Swalwell is powerful, or a threat to Republicans, and they want us to believe he’s guilty full stop.
Also, given how Republicans confess their own tactics by accusing their enemies of those same things on a regular basis, the allegations that Democrats routinely pay people to cosplay as accusers, protesters, etc., seems to make it more likely that these accusers might themselves be paid to lie or be disingenuous than would normally be the case. IOW, it’s probably more likely Republicans engineered this entire situation, and furthermore, the engineering of this might also include implicating Porter in setting up Swalwell so they can take her down, too. Sure, it’s fantastical to some degree, but certainly within the plausible scope of the dirty trickery we associate with Republicans.
All this said, I have zero idea whether Swalwell is guilty, and I have no opinion or hope tied to it either way. Just analyzing the possibilities here.