True, but "they" appear to be trying and have made significant progress.

The definition of "capture" is also important.

If Bitcoin becomes a mainstream MoE and/or SoV and all useful exchanges and payment rails require KYC and permission, then I would consider it captured.

All CEXs, Square, Strike and other leaders in this space are fully KYC'd and require permission.

I doubt it will be a black/white outcome. There will probably be a mainstream KYC/permissioned economy and a niche non-KYC/permissionless one.