Why clean plant when repotting

Question

So I have some Venus fly trap seeds growing in a 72-cell germ station. The cells are pretty small and I will have to repot soon. Whenever I have read about repotting, I always hear it is best to try to get all the old soil off the root system before repotting it. My question is why? Why can't I just scoop the entire soil block and plant from the cell, not clean off any of the soil, and then just put the hunk of soil with the plant into a bigger pot with more soil? I ask because I hear of people damaging/killing their plant in the process of cleaning the plant of its 'old' soil, and don't want to do this if I don't have to. Hopefully this is not an ignorant question.

From https://www.flytrapcare.com/venus-fly-trap-soil :

"Once you have the old soil and plants free from the original pot, start breaking away the soil from the roots. Do this very gently and methodically to be sure not to tear or otherwise damage any of the roots. You can also simply dunk the entire soil ball into clean water (rain, reverse osmosis or distilled water) and swirl it around to release the soil."

From http://venusflytrap.info/venus-fly-trap-plant-transplant/ :

"The roots of a Venus Flytrap can break fairly easily, so be careful not to pull on them too much. Gentle taps on the soil are often all that is required to remove most of the soil."

and

"The Venus Flytrap can be soaked and rinsed in water in order to remove stubborn soil and to expose the rhizome so that it can be cleaned of any dead leaves and tissue. Small scissors and tweezers (forceps) are very handy for this cleaning."

Answer 1

I have no idea how you've managed to find only references that suggest this "scorched earth" approach to repotting - which is only appropriate (IMHO) when you are trying to salvage plants with soil disease issues (and not that great then - vegetative propagation from above the soil line is a path with greater chance of success in that case.)

"Cleaning the soil off" is guaranteeing massive root damage (you may not see it, but you'll certainly be damaging/removing the all-important feeder roots - the very fine root hairs that actually take up nutrients/water.)

I would question any additional advice you've gotten from these sources, and not "clean off" the roots when you repot; and look for better sources of information.