Think of it as the difference between being a professional versus just doing it for fun. When you do it for fun, you've got no pressure, no expectations beyond your own, no contracts or obligations, no pressure to come back from injury or press yourself to your furthest limits every single season, every single year.
When it becomes your profession, you still love what you're doing, but there added pressures that can weigh on you in bad ways... Besides, living in Sweden, a guy needs to get out to a tropical place every once in a while to remain sane.