Are...are people actually saying that crafting/crafters cause people to buy gil?

No one causes anyone to buy gil, not crafters, nor people who put expensive items on the MB, nor the people who sell runs/clears.

People buying gil is the blame of one person and thats the person who is buying it because they are lazy. If instead of buying gil and working for what they want they decide to take the easy way. To try to blame anyone else is rather amusing.