I mentioned this earlier that the weight issue comes down to the ability for maximum efficiency.
There are multiple calculations that apply when discussing weight, power, efficiency to weight.
There is the discussion regarding climbing. Each unit (lbs/kg. etc.) less one has is less that is needed to be carried up a climb.
There is stamina needed for a three week tour and while less weight is theoretically better there is a point where losing too much weight makes one more prone to illness and sudden energy loss (bonking).
The ability to process protein, carbhydrates, etc. is also a critical component to power/stamina/endurance as well as stress resistance.
In Remco's case the weight could be determined with a reasonable accuracy if one reverse engineers his performances in La Vuelta.
Ultimately, the weight doens't matter from the standpoint that no one of us make decisions regarding weight.
Remco was in spectacular shape and he seemed to be very close to his maximum efficiency being at the loweest weight that could allow him to be at his strongest.
There is room for improvement but "they" got it right and anything that happens going forward will be slight tinkering to eek out a bit more or to adapt to changes.
Regarding the Tour V. Giro the issue isn't about Remco per se but rather the team weaknesses vis a vis the extremely high level of competition.
We are in uncharted territory in terms of the level of high end talent and team strength.
Pogacar lost the TDF because JV was a far superior team and arguably onje of the best TDF teams ever assembled absent say La Vie Claire or Merckx's teams in late 1960s early 70s.
If Pogacar and JV (Roglic/Vingegaard) weren't in the TDF in a hypothectical scenario Remco would have a strong enough team to win the TDF.