don't listen to these people.
See what you value most.
Summer tires will give you maximum grip and fun. They stick to the ground when it's warm out side. But the downside is they don't last very long. Average is about 2.5 years.
All season tires give you a compromise and will grip even in the slightly colder temperatures. A good set of all season tires should last about 3-4 years. So you get the most "value" out of your money.
It all depends on what you want. long life or better traction.