I guess it depends a lot on what they count as sick. I definitely don't spend 3 weeks a year in bed, but if you add up all the random sore throats, congestion, coughs that linger for a week and "not really sick but clearly fighting something" days, it may be less crazy than it sounds
The tricky part is that the benefit is invisible. If it works, nothing happens: people just get sick less often. That is a hard thing to sell to building owners and employers unless the evidence and standards are really solid
I don't think the point of the strawberry example is that industrialization failed to make strawberries cheaper or more available. It obviously did the opposite in many places. The point is more about what gets selected for when the whole system optimizes for scale, consistency, shelf life, lowest acceptable cost
When housing, healthcare, work, social life all feel unstable, the predictable option starts looking less like boring conformity and more like one less decision that can go wrong
The funny part is that "put your browser profile on a ramdisk" used to sound like an obsessive performance tweak, and now it starts to look like a privacy mitigation