A number of points.

People saying that they don't restart because it's cheating. Really? Who is it cheating? It's simply saving time by not expending energy on a game where you are already handicapped by a bad start.

The argument than follows "but you might have a great 2nd and 3rd ball". Yes you may, but by restarting, those 2 great balls are now your 1st and 2nd of a new game with a 3rd to follow to potentially reach deeper into the game.

The chances of you having a good ball are pretty much the same whether it is before or after a poor ball, what does change however is the game state after you have had a good ball, especially on the newer deeper coded games.

If you are going to get really deep into a game you are likely going to need 3 good balls. Why waste time on a game that has little potential for you to get there?

If I have a bad ball, restart, then get GC. Who has been cheated? The GC was set on a new game independent of every other game. All that has actually happened is that the 2nd game has been started earlier - not having time taken by completing the earlier game.

Having a machine at home allows you to play that game however you want. If you want to set it to 10 balls, extras being given out like candy, every setting on extra easy, that's your choice - God knows you've paid enough for the privilege.

There is an argument that it compromises your play when it comes to competition. Really? I will restart a game at home if I am aiming for a particular goal and the first ball ends without me having hit a nominal target before hand. I don't see how that effects my play in competition? I have come back from many extreme cases in competition on the last ball. That is about the players own mentality faced with a particular situation. That comes from rules knowledge, ability to play under pressure, etc. nothing to do with if you restarted a game in your own home.