Because if DEV is being paid big money for NOT providing content he will simply not provide it. If after 2-3 months people would stop paying him, he would be forced to produce quality update each 2-3 months.
So I personally care what people do with THEIR money because if they make DEV lazy we ALL get LESS content for game. Clear? I prefer to have 4-5 updates a year not 2-3. Is it strange?
With patron system it is our role as paying customer to control DEV and give him enough money he deserve to make quality game but no so much more that he stop caring for our opinion and start milking.
It is human thing that if you can work 4 hours a day or 8 but get this same or almost this same pay you will choose less. People work to live, not the other way around.