The Watchmaker: my fav argument

[possibletarian]

So does my space monkey narrative, how should we decide to take one more seriously than the other ?

You can take them equally serious. But deciding between them doesn't matter if the Earth isn't designed.

It does if you are claiming that a deity designed it, or even space aliens you would still need evidence above the narrative, simply claiming that you cannot disprove something adds no useful information at all.