Here in Sweden we eat fermented fish. Other countries eat ferment cabbage, beans, goat stomachs, or other fermented things which in my culture we would be weird to eat. I think fermented seaweed is also a thing somewhere.
There are things that could force a culture change, such as famine, war, social status signals, media, and religion to mention a few examples. Humans are social creatures, and culture is a social phenomenon, so the cause for a cultural change would likely be social in nature. I guess a societal collapse could also trigger a change in culture, or a cultural change could prevent a societal collapse. I guess it depend on how one want to perceive it, and what meaning people put into the word "societal collapse".
One-third of the world's exports of chilis, tomatoes, and cucumbers goes through the country. The Netherlands also exports one-fifteenth of the world's apples.
Aside from that, a significant portion of Dutch agricultural exports consists of fresh-cut plants, flowers, and flower bulbs, with the Netherlands exporting two-thirds of the world's total.
Why should we have to change what we eat? Surely taking that choice away takes away part of what we are, reduces our autonomy.
Why switch to seaweed when we can already produce what we already know we want?