I'm pretty sure a lot of people got easy access to gambling because of crypto. Specially before governments started trying to regulate crypto, and now there are a lot of site that ask for KYC, specially when you want to withdraw large amounts. But before that, and even though KYC was standard behavior for fiat gambling, it was possible to gamble with crypto with a high degree of anonymity.
Crypto gambling sites, usually don't ban users based on their country, so that helps as well. Of course that all this "easiness" results in a few scams in crypto gambling but there are a few respected websites out there with a lot of happy customers.
Finally, some early adopters got insanely rich when prices went to the moon, and were able to open online gambling sites by using crypto. So yes, I would say that online gambling increased because of crypto.
I share same opinion, online gambling has grow thanks to crypto. Crypto offersa lot more then fiat currencies, I`m the example of that, before I couldnt`t gamble, it was to complicated for me to deposit money in some online casino, with crypto I had a chance to play all gambling games for crypto.
Bitcoin started revolution, but in last couple months casinos are making their own tokens, we have ethereum based casinos, eos based casino, and bunch of others I`m sure, but I didn`t hear for them all. Gambling industry is definitely growing thanks to the crypto.