1) Someone asks why riders - especially GT specialists by implication, given that you've been claiming that they should be doing this most of all, despite the fact that it's diametrically opposed to their specialisation - aren't doing this already.
2) You say a few are lifting eg Sagan.
3) It's pointed out that Sagan is not a GT/climbing specialist
4) You bring in Evans, who has never been shown to be doing upper-body training.
Do you see the problem with your logic here?
(In fact, Evans all but directly contradicts your argument: Evans has a high BMI because he has developed musculature for power CLM, which is how he won his Tour. If he had that BMI because he looked like your avatar, he would NOT have won the Tour.)
(Also, BMI sucks.)