No.
He's drumming up business, just like all of the guys offering 'action jobs' that are merely the substitution of spring kits readily available from Brownell's.
However - 'do' look over the internals of 'your' piece, and look for burring and rubbing on high spots - remove them by stoning, clean, lube and reassemble.
'You' can handle pretty much everything all by your lonesome, when armed with a copy of Jerry Kuhnhausen's book and patience.
Scouts Out!