I agree with what everyone has said above. I find that the jointer has been much needed for what I do, and is especially great for me with the cnc router since I typically use double stick carpet tape to hold my pieces down. If you don’t have flat side taped down, you had better have an enclosure or wear a cup as the part will break loose. A planed piece will seem flat since both sides are parallel, but rarely is a piece flat if it hasn’t been run through a jointer (or made flat by another means).
I have helical heads with carbide inserts on my jointer and planer and love them…also understand that both are expensive and might not be in the budget for some (powermatic 15” planer, and powermatic 8” jointer), but I rarely need to rotate them and I run a ton of rough lumber through. The jointer is a must for me when making doors, frames, etc. When I used to only use a planer, I would never have a flat board and nothing would sit flush on a wall or frame. As guys mentioned above, there are work arounds though.