I understand your points Lee,
Sorry for the "should"s.
It was more relative to my spatial and historical context… I have the opportunity to cultivate and breed on a relatively large scale so the greenhouse thing with today about 1400 transplants becomes a burden, and if I wanted to cover my 1500 square meter garden (i.e. 16000square feet) I would need about 3 times that. So about 1 cubic meter of medium + organic inputs, one of which being dried blood for the Nitrogen… 
That is one reason I am converting nearly all my cucurbits to direct seeding: I don’t mind if I have losses. And it’s gonna be heavy handed selection.
Still i will allways use a summer greenhouse, and make other compromises, notably with plastic tarps from time to time, tilling or ploughing the soil once in a while, if necessary, and I will allways do some transplants… but just trying to reduce quantites, as it is such a burden, necessity to coddle them all the time, buy stuff, and as I believe it is contradictory to my local adaptation will: my dream is direct seeding. If I have a small place to garden, and if I needed each fruit from every plant I would not do what I am doing. Because it is big, I can handle accidents, and low to very low yielding at first stages of breeding.
As you see, it was quite specific, and I understand your points.