I disagree. Bitcoin started the same way on the darknet. That does not mean it had no greater value, as we now see.
The actual people using Monero are unknown. That’s the point. To say it is centralized behind a group of criminals is incorrect. It has been extensively used to get money into places like Venezuela where the state is hostile, and for all kinds of positive services where people simply value privacy. See http://monerica.com
The fact that criminals also use Monero is a feature, not a bug, and proves that it works in the most hostile environments. The fact that it enforces the fourth amendment is a good thing, and it forces law enforcement to target criminals specifically rather than enabling blanket surveillance.
Anyone who wants tools to prevent the state from abusing power has ample reason to use Monero, and given the way politics has been infringing on banking rights in Canada, that is bound to be a growing number.
Regardless of what you think of the Canadian protestors, the real question is what do you think of the right to privacy and our ability to ensure our rights in the USA, given our constitution. If we do not trust people to transact privately then lets just repeal the fourth amendment and be honest about what rights we do and don’t have.
I happen to believe the right to privacy is fundamental and that to remove it is to create a panopticon. I believe law enforcement has ample means to go after crime without violating financial privacy, and believe it is equally if not more important to prevent abuse of law enforcement powers given the tendency for corruption, political use, and lack of effectiveness that has plagued all of human history.