Before the remodel, we had 3 bedrooms and 1 bathroom. We made it work but it felt a bit small.
By American standards, 2.1k sqft for a family of 6 is not large by any means.
When remodeling, we spent a lot of time on the final layout, drawing inspiration from homes we felt good being in. My wife is an interior designer which played the largest role in our decisions. Interior designers have very technical backgrounds and a lot of knowledge in space planning.
Our remodeled house feels the right size. Not because of the sqft, but because of the layout. We looked at 3k sqft houses prior to remodeling and they felt smaller than our 2.1k sqft one despite an extra 50% of floor space.
All that is a way of saying that “space” matters. It’s not “bigger is better” and you can’t Marie Kondo your way out of tiny spaces. There’s an optimal space + layout that can reduce stress in your life.