Solved Is This Right?

Someone dropped in a pot of Hostas for us to sell on our charity event. It's large enough for us to split so we took it out of its pot ready to split it. This is how it looked underneath. I would have expected to see some thick and some fine roots but it just seems to be mainly lumpy calluses underneath.

There were no bugs in the pot and the plants look very healthy.

Could it just be that the growth was restricted in the pot and the roots have turned lumpy?

We don't want to sell them if they may have a problem.