I don't how much sales experience you have, at either the management level or the hands-on sales level, but products almost never sell themselves. You're better off changing that to never sell themselves, because of how rare the examples of it are.

It's practically universally agreed that most companies love to squeeze whatever angles they can for another dollar of profit, particularly around employee costs. So why does sales persevere in such a big way across all companies? They're not doing it for fun, they're not doing it because their products sell themselves, they're not doing it to waste large amounts of money. They do it because they have to, all of them; basically every single company on earth has to sell.