I have some bad news for you if you think profit sharing is going to replace free cash flow as a metric for company expansion. What happens if there's no profit? Have you been watching that Khadim Hussain Rizvi video where he tells the Pakistan Army to just repay the IMF loans' principal?
The fact that there are other examples of exploitation and fraud is tangential. The argument is that interest is one form of exploitation, it's not the only form.