I can understand your point, but in my experience Surgical helps because it isn't usually the 1st Show and Tell that gets through, it's the 2nd or 3rd one after they have forced you to use your counterspells/discard. Between the time it takes to fight the 1st counter war and when they refill their hand enough to go off, that is the prime time to surgical the show and tell/omniscience (if you didn't have the opportunity to get Show and Tell, obviously Show and Tell is better to get rid of because they can still Emrakul you with Show and Tell).
This video is a good example of how omnitell can grind out grixis delver through multiple countermagic battles:
https://www.youtube.com/watch?v=qk1mndluEtM (Dylan Donegan - Delver vs Josh Perline - Omnitell, SCG DC)
Don't play surgical if they might have Dig Through Time if you can help it, don't want them blanking it.