Yeh, laughing at a gene always poofs it out of existence. Did you merely snigger at the others?
On your other perpetual complaint of us not understanding the point you are trying to make - everyone understands it. The reason for that is that it's trivially true that if a population splits into two then there will be a loss of diversity in each population when compared to the prior population. You know, arithmetic? The only way there could be no loss would be if the population was entirely made of clones.
The point you consistently then avoid/ignore/dismiss is that after divergence, for a speciation event to occur, the two diverged populations MUST add more genetic variety. If they didn't the two diverged populations would remain unchanged, speciation doesn't occur and the combined genetic variance in both populations would be as it was in the original population - ie no overall loss, just two geographically seperate organisms of the same species.
Geddit?
Je suis Charlie. Je suis Ahmed. Je suis Juif.
Life, don't talk to me about life - Marvin the Paranoid Android
"Science adjusts it's views based on what's observed.
Faith is the denial of observation so that Belief can be preserved."
- Tim Minchin, in his beat poem, Storm.