A team that is too deeply integrated into a movement is just a cluster of followers. It isn't capable of independent or novel ideas, and won't add much to the overall effort, beyond what the individuals would each add.

It has to make sure everything will be approved by the movement, particularly the leaders, and will just emit more groupthink and make incremental changes. It's a mere spin-off, not an independent organisation.

Spin-offs are useful, but if you only have spin-offs...