A forfeit should not be allowed unless the team has no healthy wrestler at that weight. Bumping wrestlers up or down is the right way to try for a better match up.
A lessor skilled wrestler even if defeated may be able to keep the match close enough to allow victory, a major or even a tech. Even being pinned, the team score is still the same 6 points of a forfeit. There may be those fluke chances the lessor skilled wrestler may even win or "catch" the better wrestler to gain a victory. All of those outcomes would be better for, or equal to, team points then taking the loss by forfeit.
Protecting wrestler records by forfeit is simply a way to try and scam the seeding for future tourneys.
In team tourneys where a team the forfeits 1 match at a weight but later has a wrestler at that weight... the wrestler that is wrestling the previously forfeited weight should have to take a loss by forfeit to their season record.