The “selectivity filters” in membrane channels of living cells are able to discriminate between very similar molecules or atoms using complex mechanisms.
That’s the way it is, universally, with creative invention.
Plants have no brains and limited mobility, yet they have mechanisms to thrive in place. One mechanism involves the prevention of inbreeding.
If he chose to, could God use a sandstorm to turn a block of marble into a representation of the human form that would put Michelangelo’s David to shame?
Design advocates have the advantage of looking at both sides of the origins debate.