I've had frets leveled or crowned but I would never have them intentionally "lowered". Once lowered you can't go back without completely replacing all the frets and that gets expensive. I like to be able to get a bit of my finger under the string when bending notes too. If the frets are too low then they are too close to the fretboard and there is no space to get under them. I think the "lowering" would actually make it harder to play rather than easier, at least for my style of playing.
"No Tele For you." - The Tele Nazi
Ha! Tele-ish now inbound.