Companies who did this would be systemically outcompeted by companies who choose to look the other way when their salespeople overpromise. And you will find th

Companies who did this would be systemically outcompeted by companies who choose to look the other way when their salespeople overpromise. And you will find that in general, they are not saying "we have feature X as an available feature as of today" -- they say things like "feature X is under development" and work to upsell it/et cetera. It can be an extremely effective tactic for a lean company to explore the market without overinvesting in development, and it can be destructive behavior by salespeople to advance themselves at the cost of the company. Like so many things, it's a balance, not an opposition.