I feel the same, too, like you. When we are not at home, we can use the phones to play gambling in anywhere, besides that, if our country has been blocked the gambling games, we can connect using VPN which we can use for free so we can play the gambling in everywhere we want. That will attract more players to come to the gambling website, and they will spend their time to play gambling while they are free.
But remember, when we play gambling with our phone, we need to think about other people who join with us and don't tell them if we are playing gambling because we don't know how good they can control themselves. It is better to play alone if our friends cannot control themselves because that will be our responsibility to take care of our friends.
I understand your point on keeping other people away from gambling especially those who can't control their self in not to play gambling. I also don't suggest using vpn just to access the blocked site because vpn can get your information from your phone. I'm sure there are other gambling sites out there that is available in your country.
Its good to have such kind of feature but I don't know still it is much needed because while gamble on mobile it may leads us to play more and more time because we are holding our mobile in hands for all the time so having mobile friendly crypto sites will do more harm than good to us.
In future we will have such feature because everything is designed for our mobile in the recent days so why not for gambling as well.
That is why I ask if it is needed to be a mobile friendly. In my opinion being a mobile friendly gambling site has an advantage and disadvantage. First, it will make gamblers play more and more in gambling because you can play in your mobile phone. The advantage is you can play anytime anywhere with only using mobile phones.