Because the conception of a new group will not happen in a vacuum and most or all existing groups dominating (the 5) have legacy linkages with older groups/movements. That itself doesn't tell about the new groups' current agency & how it will evolve. Are they mere covers? Maybe. https://twitter.com/Mikeknightsiraq/status/1344679132580478978
The debate over whether these new groups are mere covers or not for the large groups (KH, AAH, HaN, KSS, KIA) is not a scholarly one as much as it is a US policy debate of whether the major groups should be struck or not by the US as anniversary approaches w/ risks.
By then, deploying patience and nuance to understand these groups and their links becomes a matter of choice and preference rather than imperative because the US policy community needs quick answers to act upon in the very short-term.
The US policy preference under Trump/Biden to see these groups as mere 'covers' for larger paramilitary groups should not become a truth just because it is their priority to see it as such now. These groups being covers may prove correct via separate journalistic/scholarly work.