There are genuine services that do not have those licences, and they have built trust over the years.
That’s true and at the same time there are many licensed casinos that ended up scamming their customers and the regulatory bodies couldn’t, or didn’t want to, do anything about it.
Licenses from some regulatory bodies are useless and do not necessarily guarantee the casino can be trusted.
Unfortunately, the crypto gambling industry is still the wild west, but it’s harder for non licensed casinos to gain users’ trust compared to licensed ones.