Of course it would have an effect. What I'm saying is, the TOP players are only doing 30% of the time. What do you think the stats would actually be for the rest of us??
Here's something for you to mull over, might give you a headache like it did me.

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We all think the break is a huge advantage. And, when spotting someone, the break is the last thing we want to give up. I'm the same way. Now, the supposed stats state that the breaker loses more games than he wins. Try an wrap your head around that for a little while.
Also, how many times have you seen a real good player give up the breaks and the 5 or 6 to pretty decent players, and still win? I have a number of times. Why do you think they are willing to do that?? Maybe because they know that the breaker will not run out over 50% of the time. That means, they get to the table the majority of games, and have the skill to turn the game to their advantage, or to an outright win.
We have all been told so many times how important the break is, and that the whole game depends on the break, that we are actually starting to believe it. It's important, for sure, but only one shot of the game.
I'm one that never wants to give up the break. But, last year I really learned something in a weekly tournament. Guys that I would only give the 8 to for the cash, I suddenly now had to give them the 7 & the snaps! (handicapping was ridiculous IMO) It actually made a pretty even game, but as the weeks went by, I was finding I still had the best of it. And, some of them were likely to put a 3 pack down on you. But, most breaks they either wouldn't make a ball, or have no shot after the break. That was when I could take over control.
I still won't give up the break, even though I "know" it's not as big a deal as I thought it was. Part of the reason I won't, is I don't like having to wait for a screwup to get a chance to shoot in EVERY rack. I like to put a package together if I can. But, they really don't happen all that often.