Knowing math specifically and intelligence generally are orthogonal to the skill of wise decision making.

Some of the smartest people I’ve ever known at any age have been among the worst at “life skills”.

Life skills and wise decision making are very hard to judge and most people will disagree on them though. I don't think 18 year olds make all the worst life choices and 40 year olds make far better ones, but I also can't really prove my statement, nor could you prove a counterfactual statement. It's hard to prove what life skills are valuable and who is good at them.

Math is at least important in many life skills most would consider important imo. Like budgeting, financial planning, retirement planning, investing, etc.