I am not talking about trying to score, however you cannot separate accuracy and execution from throwing an effective ball that has a chance to carry. I think you and I have more experience playing multiple angles and developing a roll that will keep balls in play when there is OB, or little hold area. The worst thing about house shots today is not how much margin of error it gives, but how it takes no versatility going from one house to another. When I was young we had several high scoring houses in town. However one was great from 3rd arrow, a couple were walled off the corner, and one played great right up 10 board. With the balls we had you couldn't over power the patterns, you had to learn to line up to play the pattern and learn a release that was effective from multiple angles. This was great for me in learning to play anywhere on the lane, but when urethane and ultimately resin balls came out my release didn't match up at all with the friction created by these balls. I could execute and I could play multiple angles, but I couldn't take advantage of the carrying power of the new balls until I learned a release that allowed me to take advantage of the carrying potential of the resin balls.
I think you and I can get benefit from practicing with plastic but I am not sure how beneficial it is to the guy who doesn't have a lot of experience on flatter patterns.