Probably, the reason why they hide their loses is because they don't want to lose their followers. Because if people know they made mistake, then people might not call them expert trader anymore. This is funny, a real expert trader should not matter about this. Instead of hiding loses, expert trader should just be honest at what happened and giving solution or best moves in that bad situation.
Losing followers is a small thing, losing reputation and a voice in the crypto community is a bigger one, and except for these issues, it could be the effects on their crypto work, more precisely, their collaboration on interviews and news with magazines. Their actions to protect themselves are not wrong but a bad view of them will appear if someone sees their losses, living and avoiding failure will be uncomfortable, it is better to be as you say, be honest with people and accept mistakes, everyone will be able to sympathize with crypto experts, they understand that experts are humans, not gods, mistakes are normal