>>11937678It's not an argument in a vacuum. You need something to compare it to. You're just implictly assuming that the chance of life arising is sufficient to where the universe allows enough probabilistic resources to push the likelihood of alien life close to 1, but that's not an obvious assumption.
Usually the other position is more one of skepticism, but some would argue that abiogenesis is such an improbable event that it probably only happened once in the history of the universe or that the evolution from a single celled organism to complex life is an almost insurmountable hurdle or that the conditions necessary for life are so precise and rare that they have only come together once, or some combination of these. Obviously they often go into more detail than that but that's the gist of it.
Looking into the 'rare earth hypothesis' would be a decent place to start
