Currently, I have three urethane balls in the bag, a UC3, a Purple Hammer, and a Pitch Black. Now, to be clear, only one of those typically comes to league with me, and that's the Pitch Black because I use it for spares.
I don't use urethane on our house shot because it just doesn't make a lot of sense to do so. I use urethane when I need quick traction and control all the way down the lane. Our house shot is your typical medium volume, medium length pattern, so using the UC3 or the Purple Hammer would mean having to stand way left and fighting to get it down the lane due to how early they want to dig in. That leads to silly angles, little forgiveness, and a lot of frustration on my part.
Now, I could probably get away with using my Pitch Black as a strike ball if I wanted to use a rolly hand position and stay up the lane all night. Again though, I don't because that would almost be like playing defense when, to me, typical house shots should be all about attack mode from the very first ball.
All of this being said, I have the right to use whatever I want to use regardless of what it does to the scoring pace for others. Okay, maybe I should ask myself if what I'm doing will mess up my teammates seeing as how I'm bowling for a team. Still, at the end of the day, I'm there to put up the best score that I can. If I honestly think that my best look comes from using urethane, then I have the right to use it just like someone else may choose to use a 360-grit solid asym. right up the track.
As bowlers, we need to stop acting like the other guys and gals on the pair owe it to us to think about where and how we want to play the lanes when making decisions about where and how they want to play the lanes. Is it frustrating when you know that someone is doing something silly/foolish, sure. I get that. Still, they have the right to bowl their game. It's not their responsibility to worry about whether or not I can score.