Your sponsor has decided what they want you to do but you’re not sure it’s right. It’s a common problem and based on how we used to do ‘training’ before we became ‘learning’.
Your sponsor isn’t wrong; they’re not as right as they could be. Your job is to help them understand how to be more right, to choose something more effective with which you can prove the success. That’s why they’ve decided on their choice – they believe it’s the path which will give them the best success.
You don’t have to change their mind; you have to put your offer together in such a way that they choose the one with more potential to be successful.
Don’t sell them what they think they want, help them understand what they really need.