I guess you'll also need to ban the stock market and cryptocurrencies as well, especially options and memecoins.
https://www.sec.gov/newsroom/press-releases/2014-229
https://finance.yahoo.com/news/robinhood-halts-trading-amids...
Meanwhile gambling laws are a patchwork of legacy state, tribal, and federal laws.
It won't stop anyone from playing with options.
But not at the same scale that you could while gambling.