While it's true that in principle it doesn't matter what style you choose as long as there is one, in practice languages are just communities of people, and every community develops norms and standards. More recent languages often just pick a style and bake it in.
This is a good thing, because again, code is read 1000x more times than it's written. It saves everyone time and effort to just develop a typical style.
And yeah, the code might run no matter how you indent it, but it's not correct, any more than you going to a restaurant and licking the plates.
