This has nothing to do with "it works". Of course it works. The point is that it is completely unnecessary. I just love that you're request for proof that it was not necessary was for me to show you a garden centre that doesn't want to make a profit. Fucking brilliant.
Indeed, he is doing nothing "wrong", but he is doing unnecessary things. Seedlings do not need domes. Go start a poll if you're that convinced that they do.
Heated prop for seedlings, fucking lol. Way to waste your money
You appear to be one of these growers who wants to do anything they can to attempt to turn it into a science as opposed to simply the act of growing weed. Do you sell by any chance?