Wow, you really dull that aggressively? Can you hold an edge at all with the skis after doing that to them?
Not that there's anything wrong with it, but I can't imagine trying to actually ski on something that dull.
I've never dulled edges on my park skis (other than detuning the tip and tail). I just start hitting rails on new skis and after a few laps they don't feel catchy anymore, but will still have enough of an edge to be able to carve on hardpack, ski the pipe, etc.
The first couple of rails on new skis always feel a bit sketchy but it's not really that bad. After about 20 or so rails they start to feel nice and smooth.
I just make sure to slide both directions a lot on day one, and also try to get some nose and tail press action, then you've pretty much covered everything and they'll be good to go after that.
I've always just thought that dulling edges probably takes off more edge than is necessary, so why not just let the rails do it and that way you still can have a little bit of edge left for when you want to turn.
Guess it's all personal preference.