It is dangerous to say, until evidence suggests otherwise, but someone has done the mathematics on quantum chaos.
For a random quantum event to influence a single molecule, its twenty three orders of magnitude of random events that are required.
But hey, as you mention, we are not for sure certain if it is random. It just appears that way as we have further reductive analysis to complete as a species.
I also enjoy your use of the word ricochet in this conversation.