I see this point often brought up to detract from green energy sources. But I fail to see how it would be possible to transition to any new green technology without relying on the existing energy infrastructure for manufacturing. This attitude reminds of of the saying "perfection is the enemy of the good" and would get us no closer to a green energy future if everyone held this opinion.

Put another way, what is the alternative you are proposing for the energy source to manufacture the first wind turbine (at cost and can scale)? You might be able to manufacture a couple of wind turbines with some horses and man power but it will never be cost competitive with fossil fuels unfortunately.