I don't think you run the risk of getting banned by using the bot. Only way I can see you getting banned is if the bot has some bug and it ends up spamming the site with millions of requests but I am sure that is rare.

Most gambling sites already have their own dice auto roller present. I think the reason why people use a 3rd party one is because they trust it more than the built in sites, plus there are a few more options and configurations compared to just using the gambling dice sites native bot.

These dice bots dont really help to be honest, they are more for fun and playing around. Keep in mind the house edge is what gets you.