No. Panspermia offers a third. What if life components have allways existed?
What if they are just another thing in the universe?
Further, abiogenesis is far from spontaneus generation. We are talking about known chemical reactions. They are happening everywhere.
The reason this whole probability argument is dumb is because you are essentially arguing from incredulity "I can't belive abiogenesis happend, it's mathmaticaly improvable, therefore god."
Look at our solar system? Calculate the probabilities of a planet like Jupiter forming, or mars, or earth. I bet it's pretty astronomical, yet there is no reason to belive that similar planets aren't located thrughout the galaxy.
Same with life. Just because we have only one example of it, is no reason to think that there aren't more. Showld we ever be lucky enugh to find life on another world your arguemnt would be moot. Lest of course you want to possit a planet hopping god.
Heck... what would you do if we encounterd aliens that posited a different god than yours?
That's neither here nor there....
My previous statement stands. You have a false dichotomy, further you are begging the question. Get rid of abiogenesis all together, it gains no grownd for your possition. Your god is an unknown.