These are good points. The game theory in enterprise sales is pretty perverse. Buyers want to guard against risk (including lying sales people), so they create more hoops for the vendors to jump through, which increases the cost of sales and makes the project more expensive, which drives the creation of more hoops... I've seen RFP processes from both sides where buyers asked hundreds of questions, vendors responded "optimistically", because that was the only way to get into the next round, and most of the energy on both sides was spent dealing with the buying process instead of the actual problem.