I will prove to you that God exists

[Angrboda]

Sure they do.

On the ‘fine tuning’ thingy, have you considered that it could simply be a happy accident? Suppose the universe evolved to support life incidentally. . It’s a logical leap to presume that it was intentional. 

Boru

Scientists have dismissed the happy accident theory which is why multiverse is popular. If someone flipped a coin heads 500 times in a row would you be dumb enough to conclude it was a lucky break? 

Except that it's not known whether the constants represent a conjunctive probability, a single probability, or no probability at all.

You're essentially assuming something that is unknown in order to conclude that your assumption requires explanation. No it doesn't. It's just an asumption.