That's all a gambler can do before they register. If they already understand all the rules, they register to see the casino inside. Usually, it takes a while to get used to it and get to know all the existing facilities, including the promotions that the casino is running.
KYC is also carried out to check and ensure everything because the casino does not want any problems. And we have to ask this at the beginning before we register. If the casino asks us to do KYC after registration, it will depend on our choice likewise, if the casino asks for KYC when we make a withdrawal.
From my experience, when I first registered for online gambling on this forum, I was a little lazy about reading the gambling regulations and preferred to ask the CS directly to ask about KYC, bonus rules and several other questions and if indeed the casino said they had to go through KYC after registering. maybe I will look at the reputation of the casino and if the casino has a good reputation I will register and do KYC because usually KYC after registering is just a few steps or like KYC 1 and it doesn't matter we do it for convenience when betting and just in case when get a slightly bigger win without needing to do KYC.