If that were true, wouldn't it make more sense to sink money into funds targeting the food, real estate, and medical sectors instead of directly in real estate?

If that were true, wouldn't it make more sense to sink money into funds targeting the food, real estate, and medical sectors instead of directly in real estate? After all, there is no reason that (residential) real estate prices track food and medical prices, and owning real estate outright is a horribly lumpy, illiquid, and undiversified investment.