Associate
The point is made above your statement. Debt is commitment. If you don't need to take debt, you are not committed or beholden, your are free. There is a lot of value in freedom. why commit yourself to responsibilities and legal repayment if you don't have to? I get your argument about investment and loan, but for most people, if you have money, and don't need debt, freedom from commitment is its own investment.Depends what the debt it for tbh. If you can service the loan no problem, it's really not an issue. Buying things with cash is a stupid thing to do, when rates are low. You can use the money to do more with, rather than on an item.
Someone I know just went out and spent 45k cash on a 2nd hand car. I would use the banks 100% for this. Low rates of paying back and that 45k could have easily gone into an investment to make you a decent return. It's just better money management.