i mean... imo, there r no other more logical ways of explaining how things can exist so complicatedly without the existence of a God. u implied that a scientific theory wud b found 1 day to sufficiently explain this? wat type of scientific theory can do that tho? (hopefully that makes sense... i AM after all, an ESL >.<)
however there is.
your argument is very close to the "designer argument", ie because the watch has a function, someone must have designed it
however you are ignoring the basic principles of natural selection, our species is so evolved now not because of some miraculous metaphysical being (or so i believe), the theory of revolution has MUCH empirical evidence to support its claims, as opposed to a few religious books here and there, and other noted "relevations"...
and if you're going to talk about how the environment is so well balanced (almost perfectly), however upon inspection on chemical reactions in our environment, it can be easily shown that it is in equilibrium, hence why would it not be in perfect balance?