Replying to Detuning question (serious)

Okay this is not a meme,

I grabbed some Vishnu Wets this year because I was really curious about the amount of rocker + being in a 189 cause I'm "big boned" (also a really cool brand). I was going to have them de-tuned under foot because I futz around on boxes and rails throughout the season, but the shop tech sort of talked me out of it. He exclaimed that not having those underfoot edges will turn my skiing into a surfy madness. Will de tuning really affect the quality of riding that much? (east cost skier). I don't want to catch on a rail and eat total shit, or destroy my edges, but then again I don't want all mountain skiing to be "annoying" without the edge.

Can a rail rat with totally fuckin smooth edges please advise?

Thanks