It’s all driven by marketing, how can the record companies make more money out of their back catalogue. Simply by selling a “new improved” version of the same thing. Some of the time the improvements can be clearly heard. Often not. Think of your original vinyl recordings made before the oil crisis of the 70’s, then the dreadful light weight vinyl recordings available until cd, then the remastered versions of your Cd, then the box sets. Now heavy weight vinyl again. It’s now the same with the increasing sample rates.
Along the way some recordings are improved, Many are not.
Yes, a higher sample rate can and should offer the optimal blend of quality and portability, but I am often disappointed by the fact that this is not realised,
I recently bought a 4K disc of Crouching Tiger, Hidden Dragon in a box set with a Blu-ray Disc. The Bluray copy was much the better of the two transfers. In fact the 4K version was unwatchable as it was so full of mosquitos.
In summary,, don’t assume that a higher sample rate is a guarantee of a better listening experience. It should be, but it’s not always the case.