No, not at all. Winter tires are best for winter--they are made of different compounds, the combination of which is dedicated to the rigors of cold temperatures.
Summer tires are made of different compounds, the combination of which is dedicated to performance in summer temperatures and lack of snow and ice.
All-season tires are a compromise, although getting better all the time.
Winter tires aren't just a matter of the tread pattern.
You may have that opinion, but you'd be wrong.