Dismissive avoidant, anxious attacher, fearful avoidant, secure attacher. Here are the only three reasons you should even care about attachment style theory. Spoiler alert, no it's not to get an ex back.
Number one. You have an insecure attachment yourself and you're trying to learn things about attachment style, so you can show a better and a healthier way in the relationships in the future.
Number two. You're in a relationship with someone else that has an insecure attachment, and you want to learn about this because you want to know how to navigate that relationship to make it as healthy as possible.
Number three. You're in a helping mental health space, and you're trying to use this as a tool in your toolbox, so that you can help your clients strengthen their relationships.