Yup but first clear few of my doubts
1. Almost all the frequencies gets absorbed by water except for VLF and ELF and by the very definition of frequencies, these are 10-100km high wavelength that needs ridiculous antenna systems. The most common being the trailing wire antennas on doomsday planes that are used only in as the name suggests, doomsday where the plane flies as close to the submarine as possible and transmit as short of a message as possible like "N China".
So how are you going to manage the control of that UUV?
2. Even in the previous case, the communication is very basic with sometimes being as simple as Morse code but more importantly; it's just one way. A submarine is never supposed to talk back unless it's sinking.
So how will you manage the transfer of high amount of high fidelity data from all the sensors of the submarine to the control station and then the commands from there with as little lag as possible?
3. Currently submarines have three vulnerabilities; they can be detected by SONARs, thier noise can be picked up by hydrophones or their conning towers may get caught by SARs when they surface. But now you're adding a fourth vulnerability to it; the RF.
How are you going to deal with enemy ECCMs picking up the comlink between the UUV and the control or even worse; electronic warfare?
there’s nothing inherently unique to having a human onboard that can’t be programmed into these systems.
A 20 man crew can lurk with their engines turned off and SONARs switched to hydrophone mode for 10 days. No radio communication, no ping, no engine noise...just listening to all the sounds around them. Based on the sounds and the immense experience of the crew, they can accurately identify a target and engage it...all without a single noise other than the slight disturbance by a torpedo tube getting flooded.
I guess this can be termed as something inherently unique to having crew onboard. If even it's not enough then on one hand you'd need to transmit data from hundreds of different sensors back to the control station just to know whether it's working or not and on the other two guys can go to the engine room to change a faulty bearing.