A better bicycle for most cyclists is the same as any other hobby or passion. You want the best you can afford. For some people that means eating noddles and peanut butter sandwiches and living in a crummy apartment. For others than means skipping or replacing a nice vacation with dome thing less. It's like any other things we have interest in - watches, guitars, cars, art, or even lawn or gardening equipment.
A nicer watch doesn't keep time than a Timex. An original painting may not look better than a print. Or one brand of a wallet won't hold money snd IDs better. But we depend more of things we like and want. And that brings happiness.