Rental Calculator too harsh?

[Adam Webb]

So I find that when I evaluate properties according to the BiggerPockets method, including CapEx monthly, including 5% of gross rents for repairs and maintanence, including 10% for property managers, etc, NO property passes any test. 1% rule, 50% rule, or even being positive cash flow. Should I be viewing this process of evaluation as worst case scenario and run a good, better, best analysis and move forward if it makes sense on the better?