If changing tires takes you so much time you actively avoid it and look for excuses, then you need more experience changing tires. It's not that difficult and it shouldn't take that much time.
How much experience changing tires? I never considered myself intimidated by the task. But the thought of getting up in the morning and looking out the window to gauge road conditions then changing tires accordingly seems like something I'd avoid. Especially since in my area I could be changing tires every morning.
My commute is only 3.2 miles (5 km) so it would seem like the disadvantage of studs on clear pavement wouldn't warrant the inconvenience of swapping tires for the day. Perhaps if I had a 10 mile commute I'd think differently. We'll see just how bad my Nokian Hkpt 240's are.