I am not a big fan of KYC, but of course, like many other users, I would do it for a big win.
Even though we don't want/like it, unfortunately, the situation gives us no other option or forfeits our winnings. Whether we like it or not, and even if it is against our will, when it was on their ToS, it certainly forced us to do it.
In general, I believe that this procedure is gradually becoming obsolete and many casinos or bookmakers adhere to this practice only because regulators require it. However, the latest trends in the gambling industry clearly indicate that this area is becoming more transparent and decentralized. Casinos and bookmakers are switching to payments in cryptocurrency, the player can see the results of these payments in the blockchain. Gradually, the definition of winnings will become more democratic. Sooner or later, people will be able to collect large winnings without the KYC procedure.
That is why if we gamble, we are also aware that the platform we use can someday ask for our KYC. If not all, but the majority are already asking for this even upon registration. But for me, I don't see a problem as long as I'm using the trusted platform, which is why we should choose the one that can be trusted and reputable. As it was started, we can never expect this will be stopped, but it urges all casinos that are legally operated to do the same as mandated by the government authorities.