Is that true? In a lot of new homes where I live the kitchens are one of the places the builders spend money. It's pretty common to see multiple ovens, a high end stove top, big dishwasher, gigantic refrigerator, etc...
Regular people generally can't afford new homes. Working class professionals usually get shoved into apartments (usually small ones) with small kitchens in 5+1 buildings or renovated industrial buildings.
Stuff like this is pretty common - https://images1.apartments.com/i2/5Wguguo1YZBzaUo30bfX2jUIY6... or this one https://images1.apartments.com/i2/PuDTEuad8QYuGVJfUJAbGHCZIS...
It's not impossible to cook here, of course. But it's designed around the idea that most of your big meals will be "out" somewhere else.
The parent comment said kitchens are getting smaller and smaller but I'm not sure if that's actually true. I lived in quite a few houses (middle / lower-middle class) growing up and it seemed like the older homes all had much smaller kitchens than the ones that weren't as old.
Maybe that is happening for apartments for singles and DINKs living in urban areas where your lifestyle may be shifting towards eating at restaurants more than at home, but especially for families with kids, the trend definitely seems to be larger kitchens and kitchens that are more integrated into the home.
Certainly seems to be true here in Sweden. All new houses and apartments I've seen recently have tiny open plan kitchen with terrible layouts. It's clear that they layed out the rest of the house first and then just crammed in a kitchen in whatever space was left over.