But computers needed to be created, allowed, to exist and put into existence by intelligent beings (us).
The question can boil down, not to the development of life, but the creation of existence, of which ONLY the logic of a creator makes sense and even then it doesn't. It's an endless loop, which ultimately suggests that existence is infinite and THAT is just not plausible.
That's not the point. The simulation does not depend on the computer being complex, as the rules that operate are simple. It can be done on graph paper. Simple rules such as that which can occur in simple non-intelligent systems, can lead to complexity. You don't point to rocks and gasses and say those are proof of God. You used the example of life.