At its core, it’s because ‘sales’ is literally the team that brings money into the company. Most of the cool-looking departments in a company are cost centers, and to sustain these costs, you absolutely need someone making revenue. Sure, if every tech company simply made money by selling digital goods straight to end-users in a B2C structure, this sales department might not be as crucial. But if you think about it, that's not actually how most tech business models are set up. Over 95% of Google and Meta's revenue comes from advertising, and that advertising revenue is the result of sales teams constantly introducing new ad products to clients, sharing optimization know-how, and doing all sorts of things to win over advertisers. In other words,even if a company's service model is B2C, the business model itself is much closer to B2B. Sure, if you make a great product, users will come on their own (B2C); but even if you have users, someone has to turn that into actual revenue (B2B). It would be great if customers just paid for good products without any effort, but in reality, that's rarely how things work.