I feel ya man, you are right, but he said he has 7 tall plants in the same container, jjust try to separate those roots on those.
It'd be easier to just put them all in a bigger container and then cull the males when they preflower.
but really...
seriously?
he put 7 seeds in one pot... there is only so much common sense in the world of cannabis growing.
Give the OP's growing experience I would HIGHLY recommend NOT trying to separate those seven plants..
Does that make more sense?