^^^^ I agree with this statement but there should be no guessing when it comes to towing. Use components that are designed for the intended application. Likewise, set your trailer up so it's level when properly loaded. A generally accepted guideline is that 10-15% of your level bumper pull trailer's weight goes on the tongue. Load the trailer appropriately then tweak the rest of your system (drop shank, airbags for the truck, etc.)
Towing is dangerous enough even when things are properly set up. One certainly would not want to create unnecessary risk. I had to buy a longer drop shank for my old bumper pull horsetrailer when I changed from a chevy half ton to a dodge 3/4 ton five years ago. I still used the same WD setup but to get the trailer level I had to get a longer shank. It cost me about $120 at the time but it was money well spent.