Let me play devils attorney here.
They say the generals horse's leg were ormanted with them. Now, how many gaiters would fit on four horselegs? A few dozen? 60? 100? 200?
Certainly not the entire batallion - this was done by a minorty of the regiment, probably all in 1 company (One guy took the lead, others followed).
Gaiters were part of high fashion in those days, so saying it looks ridicious has hardly got anything to do with. And eventually men regretted trowing away the gaiters, because why else would they fit their pants in their socks?