I do not wish to live in that kind of complete nightmare. And there is no such thing as too big house. How can someone even come up with that. I encourage that person to move into 10m^2 room and live there for like 8 years or so.
10m^2 is probably too small for many people, but that doesn’t mean there isn’t some inflection point where the marginal cost of upkeep outweighs the marginal utility of additional space. As an absurd example, would you want to live in a house the size of Montana, and be responsible for all of the maintenance, or would you prefer something more human-scale, like a 40-bedroom mansion?