Polyamory orthodoxy:

-people who are jealous and anxious when their partner is in a romantic/sexual relationship with another are "emotionally immature" and need to "do the work" to become a secure/emotionally mature adult

-people who do not experience a great deal of anxiety and jealousy when their partner has outside romantic/sexual partners are "secure, mature, well-functioning" adults.

I think it is entirely possible that those deemed "polysecure" are either objectively emotionally shutdown, not feeling emotions at a high level about nearly anything, or relatively shut down compared with the anxious/jealous person.

Poly people cringe at this suggestion, adamantly stating they do indeed feel many strong emotions about their partner's sexual/romantic relationships, insisting their insight and emotional maturity are what allow them to navigate the emotionally unstable waters.

The thing is, it is impossible to know how your emotions stack up vis-a-vis another person's. The emotionally distraught person is presented as some combination of weak, inferior and lazy. With the "secure" person being lauded as self-confident for conquering this petty emotions.

When I hear Jessica Fern and her ex-husband interviewed they speak robotically, without emotion. I think this emotional makeup is better suited to polyamory, but that does not imply that they are emotionally superior, they simply don't feel as much as those they deem "anxiously attached"