It must not have been safe to do so, but I actually did it some years ago, and then I was not really too informed about the risk that is related to giving out personal information so freely without minding the outcome. That's why I said that the reason some people make mistakes is due to a lack of proper information. It was after I joined the forum that I properly understood the dangers of KYC.
I hope the platform that you used was a trusted one, as at least in that instance the chances your information could be sold or stolen gets reduced in a dramatic way.
Still, it is important to avoid sharing that information as much as possible, so if there are platforms that you can use that do not ask you to pass any KYC check and that are trusted as well, then it is way better to use those platforms, as a way to reduce the chances of our information getting leaked by some reason or another.
Unfortunately, more and more platforms are coming under pressure from regulatory authorities in different countries, and everywhere there is a fight against the anonymity of players in online casinos. Almost all large and well-known world-class crypto casinos now require KYC identification in one form or another. This, of course, contradicts the very nature of cryptocurrencies, but players, even if they play from such casinos, are forced to provide their data, although of course, even in these cases of large casinos this is completely unsafe. Thus, I consider, in principle, a violation of fundamental human rights and privacy of personal life and personal information. But unfortunately, legislators in different countries, in my opinion, completely ignore this issue and, on the contrary, do everything possible to control everyone by providing your Personal Data everywhere. And specifically for crypto casinos, this is generally completely wrong. But how to deal with this is still completely unclear.