It's easy to theorize but sometimes you have to just experience flying a taildragger to understand how active one must be on the rudder to keep it straight, especially if you've only trained in tricycle gear aircraft.
Crosswinds have a weathervaning effect, and when the main gear are slightly more forward it makes for a longer arm on that weathervane. So the wind can exacerbate the already challenging issue of the CoG being behind the mains.
Go push a shopping cart backwards at speed, then let go and see how unstable the track is. It'll just ground loop instantly.
But it makes for a more fun flying experience.
