It’s like my moshol with the cars. If I argued that it was made in Japan, and you thought it was made in China, as long as both are possible, the existence of the car proves neither.
There is a Creator who is definitely capable of direct creation. He can also use evolution if He wants.
The existence of humans is no indication which happened, just that something happened. (I think it says in the Torah that it was direct, so I’ll go with that approach).