Uber/Lyft/etc create jobs that otherwise didn't exist, thus providing an additional option for potential workers. With the additional option, maybe that option

Uber/Lyft/etc create jobs that otherwise didn't exist, thus providing an additional option for potential workers. With the additional option, maybe that option is better than some people's alternative options. We can surmise that it probably is for a lot of them, as evidenced by their choice to be drivers for these companies. If they had a better option, they would presumably take that instead. Your proposition that if one person makes more money then other people are worse off has an element of truth to it, since, sure, more demand for a given item (like housing) will tend to increase its price, all else equal. But I think that's the wrong way to think about the situation. Wealth creation is not zero sum.