> Grocery stores don't require millions to billions of dollars of capital to execute each new transaction.

Neither do homebuilders, because homes don't cost millions to billions to build (high end custom homes can cost millions, but that's not what we're talking about here).

> So it's not the margin itself but actually the spread between the margin and what investors could get by investing in alternatives. Real estate investment opportunities are often measured by their advantage (measured in fractions of a percentage, .2% advantage being considered solid) over 10 Year Treasuries or S&P 500 returns.

Okay? So they have an advantage over alternatives, which means higher profits. And a .2% advantage is not considered solid, or meaningful in any way without a lot of missing context.

> Real estate developers do often actually lose money, but the more salient boundary condition is whether they can get financing for a project, where they have to clear a bar well above the "just make >$0" bar.

Many companies often lose money, due to incompetence or bad luck. The industry as a whole has very healthy margins.