Lost causes are worth fighting for and keeping in the public eye, in the history of ideas being written off or challenges being considered impossible to overcome many end up swinging back hard the other way as long as they are ripe (the framework is preserved and still championed) and there is an inciting incident that swings public sentiment.
Defeatist attitudes and throwing in the towel almost never makes sense, engaging at a lower degree of time commitment is sensible for some, the meta commentary about it being hopeless is one of the worst types of self defeating comments a person can make, especially if they aren't in opposition, whose time are you trying to optimize with the comment? To what point and purpose are you saying this except to further deflate sails on an already still day?
The zeitgeist isn't purely rational or stable, change is often non linear, I've seen small subcultures with "impossible" headwinds completely own the space within my lifetime, we're just at the heel turn now and it's not universally popular, many people don't speak up because they are just getting vpns or moving to other forms of non-violent non-compliance.