[throw0101b]

> You have agency over your business. You're just betting on a stock. You wouldn't own enough stock to have meaningful agency over it.

Yes you have more agency in deciding how to run the business, but you have little to no agency about the economic environment you're in. You're highly concentrated in one financial asset, which means any little hiccup can have huge repercussions for your life, especially since you probably only have one business in one particular economic niche.

Whereas if you own a portion of dozens/hundreds of businesses, you have less control of how they are run, but no one business doing badly will impact you as much, nor even one particular economic segment (energy, transportation, tech, agriculture). By owning a broad index of companies you are more diversified.

Further, with modern financial products you can diversify not just between market segments (S&P 500, Russell 3000), but across countries (which deals with the now do Japan retort).