As long as the farmers are made whole if their farms are indeed shut down. Right now that is a 'fear' not an actuality of any policy. Times change, things change. I am pretty confident in saying that these ancestral farms are not run the same today as they were 100 years ago. So their impact is much different.
Also, I feel the same about people that do not want to leave the environment cleaner on all levels. "Who cares about climate change, I'll be dead when the worst of it comes to pass."
This is happening now. Regardless of closing the "ancestral farms." Subsidence and storm surges happen every few months globally. Sea levels are rising. Have you been to Venice, Miami, Bangkok, among other cities lately? Flooding and erosion are a constant issues. New Orleans has not and most likely never recover its pre-Katrina population levels in our lifetimes. Recordbreaking wildfires in Australia, California, Colorado, Nevada, Oregon, and Wisconsin have all happened in the last five years alone. COVID-19, monkeypox, avian flu, orange trees succumbing to diseases, valley lung, Lyme disease, dengue fever, etc. I hope the rock you're living under is a pleasant place to live.
Multigenerational farms become incorporated groups with familial ownership or multinational corporate control. I don't know of many bucolic countryside farms these days, but if you look at the numbers they've certainly been consolidated and controlled by fewer groups over time. 'Independent family farmers' are a dying group in developed economies.
For me it was looking at the data and learning more about geology as well as systems thinking.
It was about a decade ago now that I was curious what the big deal was about CO2 ppm rising so high, and then again a few years after that when we reached a new minimum for global sea ice. Looking into the details of these problems and then learning more about how our global energy economic works I started to realize the situation at hand.
The more you understand the data as well as ways of viewing climate modeling from various different scientific communities the more you realize how dire the situation is and how often our models under estimate variance, and how that variance is more likely to be on the "worse than expected" than "better than expected" side of things.
But, I'm also of the perspective that it's far too late. We can't even tackle nitrogen pollution in a relatively progressive area of Europe, we'll never be able to touch on the larger problems we're facing. On top of that the time for action was around 30+ years ago.