That's like calling the Executive Branch one person (currently filled by someone with extremely little expertise).

Congress includes bureaucratic organizations staffed by career experts like the Government Accountability Office. They used to have the Office of Technology Assessment until it was killed off by ideologues. They also enjoy ready access to experts from the various agencies.

> Of course Congress has to delegate to executive agencies. This is not abdication.

They've very clearly abdicated their responsibilities to the Executive in things like war powers and surveillance oversight. They are supposed to serve as a co-equal branch of government and as a check on Executive power.