Look at these remarks:
"Avoid Kombu due to excessive iodine
Avoid Kelp due to excessive iodine"

Excessive is only excessive if you consume too much. I think he's part of the iodine is dangerous mantra that a lot of them still continue.

Excessive iodine doesn't make sense when that's what most are looking for, the seaweed with the most iodine like in all of the supplemets. Especially when we are coming from a state of deficiency. You're right he is vegan so he must be eating it so wants a lower level.

I read a list of Seaweed a couple of days ago and this might of been one that was way down the totem pole for iodine.