In my opinion, it does create excitement as losing a turn on the table can suddenly change everything in a hurry.
For example, USA vs. Finland QF match where USA was down 2-4 and FInland played what appeared to be decent safely (with one ball visible). SVB made a great bank on 1 to start the rack and USA ended up 9-4 win (Finland didn't get back on the table until it was 6-4 USA). This can only happen in winner break.
There is no question that it creates exciting moments like these. What people conveniently forget about is all the lopsided boring matches that it creates as well. Is it worth having to fade all the additional boring matches that aren't close just for those occasional really exciting ones? Some say yes, some say no, but I think many more would say no after alternate breaks became more mainstream and they got more used to the idea.
Personally I think people are mostly just stuck on winner breaks because that is what they are used to and that if all events exclusively used alternate breaks for a couple of years the majority probably would not want to go back to winner breaks. There is just too many more exciting matches with alternate breaks, and you will still have the big come backs that create those extra exciting moments on occasion under that format too.
Another thing I think people conveniently fail to think about is that every popular sport in the world that I can think of has rules in place designed to ensure that both sides get about equal opportunities to score. Do basketball, and football, and soccer, and baseball, and hockey, and tennis, and volleyball and literally just about every other single popular sport have it all wrong and pool is the only one that has it right?
I mean when the Lakers shoot a basket, they should get possession again right? That way you might get to see the Lakers score ten or more baskets in a row before the other team even gets to touch the ball. What a game changer that could be. How exciting right? When the 49'ers score a touchdown, they should receive the next kickoff right? That way when someone fails to score it could be a real game changer. You might get to see the 49'ers score seven touchdowns in a row before the other team even gets possession of the ball. How exciting huh? The only reason people prefer winner breaks in pool is because that is what they are so used to that it is the only way they can think of pool. Once they got used to alternate breaks in pool they would prefer it just the same way that they prefer alternate scoring attempts in every other sport on on earth--because it is a superior format in a number of ways.