As I've said before, there's no reason to suppose that all sentient (or even sapient) life has a humanoid form.

But considering the infinite nature of the universe, there's no reason to suppose that earth humans are the only humanoid form of intelligent life, either. Or even to suppose that earth humans are the only humanoid form that is likely

And people are also not considering the possibility that our genetics have been interfered with by intelligent humanoid beings somewhere along the way. It's entirely possible that the first humanoid form arose in another part of the universe, and has been traveling around the cosmos "spreading their seed" so to speak.