They're not very creative, so they can't think up other nefarious schemes so they just accuse their enemies of what they're doing. Grooming kids? Check. Corrupt sons of presidents involved with "overseas investors?" Check. Stealing an election? Check.
It also works to help obfuscate Democratic corruption as it's nowhere near as bad and when pointed out is immediately compared to the much worse Republican corruption, which in turn pushes the envelope (full of cash) forwards even more. It sucks.
There’s a reason dollar amounts are seldom mentioned in conservative Hunter Biden tabloid articles. Otherwise simple math would reveal the comparative and objective scale of potential foreign interest.