OK, let's try an analogy based upon a real life situation.
I've just got an NHS Hearing Aid. It's cost me absolutely nothing. With this, I will receive free batteries (they run out pretty quickly - once a week is good going, apparently), free retubing, free adjustments, free domes. I'm also having a free MRI in order to eliminate malign reasons for the onesided tinnitus and hearing loss.
It sort of connects to my phone, but doesn't have an anti tinnitus programme, doesn't screen out electromagnetic interference, isn't a colour of my choice, doesn't match either my skin tone or my hair colour and I've found it annoying at times so far. But I can tell the difference when I pick up the phone at work or if somebody speaks to me on my left side, especially when there's noise on my right - meaning I wouldn't be able to hear the person without it. It also picks up somebody speaking to an audience (along with the mutterings and rustlings of the rest of the audience), although it doesn't have a T loop and I can only turn the volume up or reduce the sensitivity by pressing a tiny button on the back of it to engage 'restaurant' mode or going through my phone.
I could, if I wanted, go to a private audiologist and get a hearing aid with AI processing, full wireless connectivity, automatic noise cancellation to counteract the general hubbub of work or traffic, rechargeable, the colour of my choice and fully customisable to multiple situations in addition to the AI automatic adaptation to the sound type/level and full directionality in the microphone spread pattern. It'd cost me several thousand pounds - and would incur VAT at standard rate - as would all the additional paraphernalia, such as a desk microphone for meetings, a portable mic for lectures, something to connect to the TV or even a TV that has bluetooth connectivity for hearing aids (been looking at those recently, they work so that DP could still hear the TV at a normal volume whilst I'd also get the signal direct into a HA, rather than just being a headphone setting that would switch the main sound off).
I can hear well enough to function with the free one, but I could make a choice to purchase a vastly superior specification HA privately and, for that luxury of having a somewhat better hearing aid than the one the NHS provides (as it doesn't magically turn my hearing back to normal, nothing can ever do that), I'd have to pay VAT. If my hearing deteriorates so that I would have to pay 20% more for a different one or I need a second aid for the other ear, I'd either have to pay the extra or go back to the NHS for two completely free hearing aids.
Nobody's screaming from the rooftops about how disgustingly unfair it is that a private, higher specification hearing aid is expensive and carries VAT - I'd be told to stop complaining and either take the free NHS one or pay the price including VAT for the private aid. As for the HA compatible TV, obviously nobody's going to say of course I should get a free Fire TV or a Sony, for example, off the NHS. If I want that luxury, I'm going to have to pay for it.
Being able to hear is fairly important in life in my experience - if somebody is profoundly Deaf from birth and BSL is their first language, they could very well differ in opinion, as they are perfectly entitled to do - and as such, the NHS gives me the right to
- an Audiology referral,
- a hearing test (in fairness, these are zero rated in the private sector)
- an aid and
- all the ongoing consumables and support
for absolutely zero cost unless I stick the hearing aid through a 40 degree whites wash or the cat eats it (when it'll cost me £70 for a replacement - and some pretty hefty vet fees if the blasted animal consumes a battery in the process).
Having the fanciest version may well be better subjectively and maybe objectively - but it's not free, it carries VAT and is a want, not a need.
I don't expect you or anybody else who has the sort of income that makes private school fees even a fleeting possibility to care that I've got a free hearing aid instead of the fancy spangles one. I very much doubt that you're gleeful I can't have the fancy spangles and telly. Why would you? It's irrelevant to you and your lifestyle.
Why do you expect me to care about you?