flobaba you have to use data correctly. that's all. i can throw out any number i want and scare people with it, if i want. it's my job to work with companies to use the right data for the right decisisons. but also to focus on the human side of things. in my experience, it's important to get the data spot on, but the human side of things ends up being 75% of the solution - i.e., behavioral change, getting the right skillsets in etc.
It will be the same in football. I can show you all the data you want, but if your attack doesn't have a player like Mbappe, Isak or Salah who can make space for himself to take shots, then there is only so much you can do with the xG. You can try run some different plays, but you're always going to have fundamental limitations