I do actually know a few people who are like me and really enjoy both doing the biz plan/strategy half, and the marketing work, and product/tech. It's not as common but I enjoy working with them a whole lot more. We almost always create better results when the tech people are also biz people who understand how what we build needs to fit into the market. It's also super helpful to have some personnel fungibility when you have a small team where you're shelling out 5-20% equity for new members.

In my ideal world basically everyone is like this and the walls between "idea guy" and "tech guy" are knocked down. I've heard a lot of folks get cynical about sharp technical types who get hired by big 3 mgmt consultancies, but ime they're often great places to find those who are both technically sharp and can make a killer deck.