Are there any bot scripts that were (and are still) considered legitimate these days? If there are any, I am not aware of, please share 
I think these kinds of scripts are not worth trying. I've read some articles before proving that almost all (if not all) dice bots are just created to scam. I remember one from those that say the bot was not giving back the money to the players, instead, the owner just accumulated the funds and then run away.
Do you think there was a legit bot script? I doubt it, no one will give you a way to make money when they can maximize it especially if there's no risk and easy to make money. What @OP just show to us is only calculation, most of the time there's a big difference between expectation and realization because not all thing will come true like our expectation. I think these kinds of scripts are not worth trying. I've read some articles before proving that almost all (if not all) dice bots are just created to scam. I remember one from those that say the bot was not giving back the money to the players, instead, the owner just accumulated the funds and then run away.