These cables aren’t really trying to protect against lost data, or at least that’s not why people buy them. They are trying to reduce noise on the line which might contaminate the destination streamer/Dac, In theory this could then impact the analogue audio section. Similarly people might use internet fibre converters to eliminate all potential electrical noise. If you subscribe to this site then likely this is not a real issue to you, if you subscribe to some other sites then your streamer is near unusable without such network isolation.
Ground:
The theory is that noise is transferred to the DAC via the ground of the connection. But Amir has already shown with measurements that this grounding theory does not hold for a properly designed DAC. Even if the theory would have been correct, any cable needs a ground connection so no cable would be able to solve this (non existing) problem; it can only be solved by proper design of the DAC.
Signal:
The signal cables of any ethernet cable are already fully optimized for noise rejection. They are twisted in pairs. One of the pair will carry the signal S while the other one carries the same signal with opposite sign, i.e., -S. At the receiver the signals of the pair are subtracted, so you get S - -S = 2S.
Now, if the twisted pair picks up noise N along the route, this noise signal will be the same for both cables in the twisted pair since they both have the same distance to the source of the noise (they are twisted to ensure this is true even for noise sources very close by).
One cable of the pair will carry the signal S + N
The other cable of the pair will carry the signal -S + N
At the receiver side the signals of the pair are subtracted, so you get: S + N - -S - N = 2S
The subtraction eliminates the noise signal N
Every ethernet cable is constructed this way, hence the name "UTP cable" which means "Universal Twisted Pair cable".
There is nothing to improve here, it works best if the cables are thin and twisted to ensure both have the same distance to any noise source. Making them thicker makes things worse. Additional shielding helps some more, but for shielding you do not need to buy audiophile cables since shielded UTP cables are commonly available at low cost. But as already stated by others, the twisted pair principle is more than adequate in an average home; additional shielding is overkill in most situations.