Not everyone focuses on reputation alone; of course, that is the most important, but I believe those gamblers who are risking a decent amount of money will make sure they can go after a casino once they go dark. And you know, without a license, you can never do that since you don't know the people behind the business.
Your point is completely contradicted by 1xbit themselves because they have a curacao egaming license, but the victims aren't able to go after them which is why licenses aren't really useful in the crypto gambling world.
with all this means we need to keep distance in new casino because they have not established their reputations?
Even new casinos can be assessed pretty quickly through their reputation in the short-term. Reputation is checked from the moment a site starts its services.