What is the point of a recount without confirming the validity of counted ballots?

Georgia has conducted one recount, which found about 5,800 ballots that were not included in the official count. They have claimed unintentional errors on the missing batches. I do not know if any of the accidentally missed batches favored Biden; but I do know that the missing ballots ended up providing a net gain of 1,400 votes to Trump.

A recount of ballots without any attempt at re-validating the ballots will not change the results. However, if signature matching could be verified, that may not only show a significant number of invalid ballots but also point to election officials’ complicity in a fraud scheme.

So a recount, to be meaningful, should include a complete revir=ew of the process from the time a ballot was received. Otherwise, what is the point?