You can certainly try that if you want. Black will still just play c5 and then later d5 at some point. Things will still often be fairly symmetric and boring. I don't enjoy these positions.
Trust me, they do not wind up symmetrical. If Black tries to specifically do that, then after b5, with pawns being a7-b6-c5 vs a4-b5-c4, White will play a5 and after axb6 and ...axb6, Black will have a hard time defending b6 given his huge space disadvantage on the queenside.
All you care about on the Kingside is that you don't get mated or lose tons of material preventing it. The queenside pawns are your Trump card.
And I should add that trying to go purely symmetrical by Black is actually losing.
1.b4 b5? (One of the few cases where mimicking White truly is a mistake) 2.a4! And already White is better!
You can certainly try that if you want. Black will still just play c5 and then later d5 at some point. Things will still often be fairly symmetric and boring. I don't enjoy these positions.
Trust me, they do not wind up symmetrical. If Black tries to specifically do that, then after b5, with pawns being a7-b6-c5 vs a4-b5-c4, White will play a5 and after axb6 and ...axb6, Black will have a hard time defending b6 given his huge space disadvantage on the queenside.
All you care about on the Kingside is that you don't get mated or lose tons of material preventing it. The queenside pawns are your Trump card.