Compelling reason podcast question

How smart is it to set commitments/goals that aren’t in your control? In your podcast you compared a new coach committing to getting 10 clients with someone committing to go to the grocery store. Committing to going to the grocery store doesn’t involve other people’s decisions/actions. But getting 10 clients requires actions from 10 different people, and you can’t control other people. Wouldn’t it be better to commit to actions that you have more control over? Things like – i will work 2 hours a day on marketing, I will call 5 people every week, I will write a blog post twice a month, etc. Wouldn’t making a commitment to a goal that involves things out of your direct control kind of being like writing a manual for how you want other people to behave?