I still find the thought of changing tyres for the summer and winter months particularly funny. Are we road drivers or F1 drivers ?
Try it...and you will know.
Ever driven on Toyo R888s or Yoko A008s on a warm road or trackday?
If you had, you'd know the difference compound makes when matched to the conditions.
Ever driven a track on slicks?
Again, if you had, you'd not want to drive on a dry track without them.
Ever driven a hot Hatch on a road at 1-2 degrees on winter tyres?
If you had, you be looking to fit them.
It makes THAT much difference.
You don't need to be a F1 driver...any driver with a pulse will spot the difference immediately.