Personal preference. I do watch the league and understand what's going on, but I'm Bruce Matthews old school when it comes to LS. The comment wasn't made out of ignorance as you suggest. Would rather have the backup C/G (whose active on game day) doing it.
It is not a matter of what I or you want, but what the league does. the majority of the league has a dedicated LS who is considered a stating player. The year the Texans used Joel dressen as long snapper as soon as he became more than the 3rd/4th TE the team brought back the guy he replaced.
I want the job done near perfection since a snap that can't be handled is as much if not more a game changer than a muffed punt. Teams seem to think near perfection is better than old days when thye just found somebody to it 'pretty good." i know that Matthews was more than pretty good, but he was even a dinosaur as the last half of his career in terms of how the position was handled.
Point is the NFL as a near whole thinks LS is specialist position worth a roster spot on its own. Bringing up that the LS does nothing else is moot point.