You are correct it is nice for more security. But they should be excluded from promotions.
Nowadays everyone expects gamblers to do the same because it is a cultural thing, you don't have to and by all means you shouldn't if you don't want to, but also do know why they would want something like that or at least why they would expect it.
Right now it is totally different situation, only the super rich could spare to give you money, which there are some out there gambling and I understand it, but they do not have to give anyone anything since the amount is now not just few cents or whatever but more like few dollars at the bare minimum, so there is a huge difference giving away money, when you start you wouldn't know when it hits 50 bucks given away. Also, there has been so many scams on casinos that people do not want to give away money in case they are doing it to some scammer.