That framework is useful as long as we do not turn it into universal diagnosis. Jealousy does not automatically mean someone has an anxious attachment style, and the absence of jealousy does not prove perfect psychological security.
The more interesting point is that a system designed to detect threats does not have to be perfectly accurate.
Jealousy can appear when infidelity is actually happening. It can also appear when a partner is simply talking to an attractive person and has violated no agreement at all. The emotion says, “This bond matters to me, and I noticed a possible threat,” but it does not provide evidence that the threat is real.
That is where the distinction between feeling and control becomes important.
Someone can examine their jealousy, ask for reassurance, discuss boundaries or admit that a situation affected them.
Or they can make their partner responsible for eliminating every possible situation in which jealousy might arise.
The first allows a relationship to tolerate an uncomfortable emotion. The second can easily turn one person’s emotion into a system of restrictions for the other.