Just my opinion, but unless someone has a very high rev rate, urethane is rarely a good option on short oil. Short oil, when played properly is very high scoring. A reactive ball coming in from the 3, 4, 5 board area just blows the rack away if you get into pocked or light. A urethane ball will not.
I suspect this issue is people not being used to playing outside and don't feel confident. So urethane gives a greater sense of control. The better way to use urethane (or plastic) for sport shot is to take it to practice so you can get used to playing outside on the THS, then on a sport condition will be more ready to play that line.
So I don't see the point to giving up such a good line to pocket, for urethane. btwn I have 3 urethane balls, practice with them a lot and think are good for certain lane conditions, a fresh sport shot plus with my mid 200 rev ball isn't one of them.
Ruining conditions. I don't understand this at all. The old urethanes didn't flare, so they deposited oil down and lane. If a ball flares it will deposit oil is small tracks downlane, not dump oil there like a 1980's era urethane. So why should a modern urethane cause much more carry down than a reactive?
Anyway, If I'm throwing 1 ball, and someone else thinks it ruining the pattern, I guess that's his problem.