Lots of devs out there have great social skills which can translate well to sales. Sales is primarily communication and human connection and plenty of devs are capable of that.

Lots of devs start in sales because those jobs/careers are incredibly prevalent. Think basic sales jobs like retail, call centers, etc.

Lots of business people unironically "learn coding" to great success. Some even build "huge products" that solve big problems.

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Anecdotally, I know people who fall into all of these categories. I don't think we should condemn people to one function/talent... and, I don't think we need to talk down to cross-functional devs or business people.