If you build it, they will come. There are a lot of dapps on tron that don't deal with gambling. Games like trongoo, chibifighters, and many others as well as social media type dapps. And one of my main draws to tron over other platforms is that I pay no gas fee to play as long as I have trx frozen for energy, which I get trx dividends in return for freezing it. This is a super exciting time for tron!