I think we went over this already.
Why does anyone do anything?
Because they like doing it.
Sailing is harder then using a powerboat, people might prefer a challenge.
Sailing is a lot more technical, there is something appealing to being in control of how the boat gets somewhere rather than drive the throttles forward and turning the wheel.
The adrenaline can be overwhelming when you are going fast.
Sailing can be incredibly peaceful and relaxing, just cruising along without any noise or smell.
With power boating it's more like "driving around" and more about the destination than the trip, when sailing, the voyage is the main point, the destination a bonus. With power boats the destination seems the point (let's get there fast).
And yes i'm posting this video again: