No because investment brokers, who you make your calls and puts with have a license.. Not the same thing. Nobody is asking the gamblers to have a licence, just the service provider.
Edit: not sure if you misspelt But for Bet, but a BET is certainly a gamble ?
Right, because it's not gambling, there are different regulations around gambling. All they need to do it GET their gambling license and they can continue, but in this case they will need to follow those regulations.
Such as (Italy in this case):
Offer self-exclusion tools for vulnerable players;
Implement identity and age verification procedures;
Comply with anti-money laundering (AML) regulations and GDPR for data protection;
Pay online gaming taxes, which range between 20% and 25% of gross gaming revenue.