I agree, however when working on robotic welding we found that sometimes due to other controlling process factors we couldn't always guarantee a spatter free weld and occasionally we would use anti spatter to reduce finishing time. more importantly anti-spatter was necessary for fixturing.
I just wanted to add loctite just came out with a very new and different anti spatter spray SF 7900 that is ceramic based
https://www.youtube.com/watch?v=aQAiZFf0Nk4 it dries into a slippery powdery like coating and honestly it's the best anti spatter spray I have ever used for GMAW guns and fixturing, It's definitely not a weld through anti spatter or meant for parts, but I swear by it for things like your weld table or your MIG gun.