Considering Earth as the only example we have, life actually did just seem to "pop up" once conditions became favorable. Liquid water first appeared on Earth about 4.4 billion years ago. The first cells appeared about 4.3 billion years ago: a mere 100 million years after liquid water appeared. It might not have even taken that long, it's possible that new evidence will be found which will push the starting date for life even earlier.Its most likely about the circumtances that can cause to form a live. Which is tempature,water and other elements etc. And theres another thing which If you even satisfy these conditions life just doesn't pop up.
The fact that life seems to be so readily formed, at least on Earth, suggests that the probability to form life may be rather large and that the conditions sufficient for abiogenesis may not be too particular.