Better than full of rusty parts !!I don't want a gun full of filthy grease when I clean it. getting back to ZERK, My guns do not come equipped with ZERK fittings.

(Couldn't pass it up!!!!

Sure! It's not for everybody. Probably depends on your climate, how often you shoot, whether you clean action parts every time you clean, have an "action shield" (which keeps the grease much cleaner). . . or just don't wanta !! No biggie, it's just an option that makes "maintenance" easier if you're not in to "maintenance". I don't shoot bp so mine have been filled for years.
Mike