If attachment is defined as emotional bonds as HSPs we know attachment better than anyone. Our emotions run so close to the surface in everything that we do that we often feel more than most no matter which or how many attachment styles we may identify with. 

Identifying ourselves as HSP or Empaths and seeing aspects of ourselves in different attachment styles gives us an identity, gives us something to hold on to as a way to try to understand ourselves better.

The yama of aparigraha teaches us to take only what we need, keep only what serves us in the moment, and to let go when the time is right.