It is a skill and the masseuse needs to pay a lot of attention if she is not going to ruin the edging.
Ruined handjobs being something completely different

Actually, edging is used quite a lot in the BDSM/dominatrix/mistress world. Keeping a tied up submissive on edge for a long period.
A mistress I knew would do this then deny the slave at the end making the edge play and frustration even more painful to deal with.
Whatever floras your boat I suppose.