There are millions of dollars of software sales that say otherwise.
And there are billions of dollars of arms sale saying we need wars?
Dollars aren't the best way of measuring usefulness. A lot of damage is caused by money.
It doesn't seem wrong to me that a salesperson would find your email on a business site so that they could sell to you. Cold contacts are annoying when your answer is no, but morally wrong? Just use a burner email for every public location.
okay, there are millions of users paying money directly to use the service. they clearly find utility in it.