Stupid question: can't we just start selling homes to each other at cost? Like, the cost it would take to build that same home again [on the same land], rather

Stupid question: can't we just start selling homes to each other at cost? Like, the cost it would take to build that same home again [on the same land], rather than speculative value. I imagine the price of the house would fluctuate with the price of construction costs, so if you bought a home when construction cost $300k, and now it costs $250k to construct the same home, you'd be underwater if you tried to sell it. So either people would be stuck in the same home forever (which won't work for some people) or the home could be sold at the value that the owner originally paid. Which would mean the home would cost the same... forever... which would lead to homes that are more expensive than new construction. I suppose that would then cause new construction to increase, until new construction is more than the cost of existing homes, in which case the market would get tighter as new construction slows. I can't think of the other potential ramifications, but it does seem like it would get complicated and might not be the solution I'd like (assuming people would ever go along with it to begin with, which they wouldn't...)