If you don't understand the point of weather changes in a virtual world, then you don't ride long enough.
When I trialed RGT last year, they had 3 routes. Riding each once was enough for me. As decently looking as the graphics are, I don't see myself wanting to repeatedly ride the same route, nor go through the trouble of converting real outdoor rides.
Even Zwift routes bored me after half a year. I unlocked most of the route badges and then let my subscription expire last year. I appreciate that using the same collection of routes make racing more interesting because one can learn how to tactically apply power or powerups, but I don't race so I'd rather have a vast database of routes to sample from for the sake of variety.