Coz they are not as good at entrying as Jett, Raze and Neon + no stopping power in CT such as nades, satchels, stuns.
And double dualistist comps are <<< than initiators or controllers in terms of utility usage and strategy.
This meta will be alive forever in competitive Valorant, so RIP or these duelist agents needs rework to compete with Jett and Raze.