Wheelsucking is preserving strength. You can't accuse any rider if he preferes to save himself rather than burn his matches prematurely just with the goal of you and other viewers to have a dopamine kick.
Nonsense. Every rider can ride for himself but why should he be burnt that way until the right moment comes, if it comes at all? Wheelsucking, feigning tiredness, race reading, body reading, attacking, conserving your energy are all skills in a sport that is based on managing efforts along a race or various days.
The fact that everyone wheelsucks is why many races are won when an attacker escapes a large group and group dynamics fail in the pursuit. While everyone knows that he can be brought up in terms of sheer strenght, the rider won't likely be caught because someone has to do the work (unless he is MVDP) while other would wheelsuck his lifeforce and would likely benefit in the end, leaving him without any profit.