It’s literally incorrect that businesses can sustainably provide no value. It may be the case that they can sustainably offer deals you wouldn’t take, but how we get from there to the business being immoral, useless, or deserving of a ban is more nebulous.

If people are systematically taking deals you wouldn’t, there might be a broad societal problem (why is tht crappy situation anyone’s best option?) or an information problem (why don’t they know better?) but the business offering the deals is probably not a logical or useful target if you want to address the larger problem.

> It’s literally incorrect that businesses can sustainably provide no value.

That depends entirely on the definition of "value".

If a business exists solely to move money/stock around, that action does not create "value", in the sense that juggling oranges does not create "value".

Trading stocks is an effort to take advantage of the fluctuating relative value each stock has, so that individuals can take home the "profit". Such "profit" is not created, but sifted out of the economy. Is that 100% worthless? No, but it's darn close.