You haven't, there isn't a single number in that reference. Even now you can't, you completely avoided quantifying the benefit and created a strawman for the costs.
> There’s a big difference to us between 10 calories and 10,000
What about the small difference between 10 and 200? That would move you from 50 mil to 1 bil. What does your "cost/benefit" formula say?
> It would help if you read my posts here.
The opposite - because I did and saw you unable to justify the results even after you tried to expand the original point several times. What would help instead if you tried to focus on a coherent argument instead of making up false claims about the other person.
> Mobility is a complex test of a wide range of cellular machinery. Which means that cellular machinery works well.
So again you have nothing specific to say, what you actually need to prove is that probability of live birth is part of that causal "wide range" of complexity. It could very well be that high mobility comes at the expense of that probability.
Analogy: you can make a car more mobile at the expense of driver safety/comfort while the same generic "mobility complex test wide range engineering machinery" would be true.
