there is enough luck in pool, we do not need more.
Exactly.
People are confused about the difference between real difficulty and
fake difficulty. They've come up with that term to help explain it in the world of video games. We've never really tried to make the distinction in pool but we should.
Real difficulty can add depth and make a game interesting. Fake difficulty just adds frustration.
Real difficulty decreases the role luck plays in the game, fake difficulty increases it.
Examples of fake difficulty:
Behind the line - you're forced to kick at your object ball, or your only viable shots are banks. Are banks and kicks harder than normal shots? Yes. So should we play with those rules to make the "cream rise to the top"? No, because it increases the opponent's chance to get get away with murder when he scratches.
game ball on the break wins - is it difficult to make a game ball on purpose? Yes. So should we play with instant-win rules? No, because usually when it happens it wasn't some highly skilled 'trick break', just a regular break that caught a roll.
Make-it-take it - is it more difficult when your only shot is a thin cut 7 feet down the rail? Yes. Should we play with this rule? No, because you shouldn't be trapped in a position where missing a 15% mission-impossible shot could cost you the game, when neither you nor your opponent had anything to do with creating that situation.