Dismissive avoidant attachment can sometimes work perfectly

If it has a subconcious, perfectly working filter that doesn't tire someone out, doesn't start making life feel bland but instead just doesn't let sadness in nor does it think about it, like complete erasure on command and complete removal of want of intimacy or people to the point where lonliness isn't a problem, internaly and externaly everything works without tiring the person out and they keep their avoidance at maximum without side effects of being a jerk, sadness, narcicism or regret of rejection or rejecting