The reputation of a state’s election officials is based on their getting it right - the first time.
If, in a recount, the numbers are off significantly from the initial count, it calls into question the integrity and competence of those election officials. They will want the recount to mirror the original count as closely as possible to ensure that their reputations remain intact.
If it comes to a recount, Trump and the RNC will have a lawyer/lawyers in every place where the recount is going on.
It gives me a huge pain in the rear when I read cavalier comments by (some) FReepers about how easy it is to manufacture thousands of votes. It's much easier to create fake voters than it is to gin up votes once the process is underway. That's why the registration organizers are usually the ones investigated, not the election officials.