Sweaters can be so darn expensive and a lot of the time you can tell the difference between a “cheap” sweater and a “more expensive” sweater. Besides the shape, there is softness and ichiness to consider. Because there is nothing worse (in terms of fall/winter clothes issues) than an itchy sweater. You want to be warm and cozy not scratchy and annoyed.
But softness comes at a price, a higher price than that gauzy summer blouse. Besides quality validation, you will most likely wear said sweater more than you did that one blouse.
Wait, I am now validating expensive sweaters as a I provide you will lower price point options. Whoops, my bad! BUT these options are not itchy or lacking in quality fit.