Your argument is valid if users only use the EOSBet site to earn dividends. However, EOSBet is a growing online casino, and there is a probability that this site will have enough games to entertain many users. Again, the BET token price will depend on how well they gain profits -> it means to acquire more user base -> it means increasing their product quality and service.
There are lot of plans from the team to add more games and I guess we are to wait for those to be released before we can BET tokens available to the market. By that time, More people would see how much valuable BET would be depending to how much dividends are received by holding them. Nevertheless I'm still interested to see how the market reacts given the certain rewards for having BET tokens.
Note: Don't quote that guy again.