The truth is that without Bitcoin or crypto currency there have been gamble but it wasn't as easy as it is right because of the easy deposit and withdrawal methods. But what's really the problem is that like you have said already that it's easy to access gambling sites while sitting at home. So based on my perspectives the easy access to gamble is now the problem and not Bitcoin or crypto currency. Even without crypto currency but easy access to gamble people will still gamble while sitting at home. So crypto currency is not the issue but the easy access to gamble.
There's things we misunderstood in gambling and Bitcoin, from the onset gambling has been into existence, but many people who is into gambling knows already that gambling have started from long time ago,
The impacts Bitcoin created in gambling is that, Bitcoin make it easier to funds some gambling websites, so we need to understand such theory, because gambling is not something without bitcoin it will not function properly, from my understanding, it seems that gambling create more awareness to bitcoin, gambling is like the pathway that fuels the Skyrocket or popularities of Bitcoin.