They changed a date. They've made bigger changes to TOS during TOS.
Right but there is alittle bit of a difference between something like perhaps a soft retcon or just a random inconsistency... and actually outright changing something AND confirming it with dialogue.
If at some point someone was like "The Eugenics Wars happened in 2032.", it would leave us with conflicting information that we can then... conjecture and ponder all day to try to reconcile. Prior to Tommorowx3, I had headcanoned that there were two different Augment-related wars that later historians referred to in a broad stroke as "The Eugenics Wars" (plural). Khan et. al. happened in the 90's, and was probably a conflict mostly in Asia, and then in the mid-2000's Eugenics Wars 2: Augment Boogaloo happened that rolled into WW3.
When it's "The Eugenics Wars were supposed to happen in 1992 but due to time travel now they happen later", that's a fundamentally different scenario that erases/invalidates the previous information.
Kinda, yeah. Inexplicably incurable.
Kirk needs eyeglasses, because he's allergic to Retinax V. What would otherwise be anachronistic is hand-waved away by a helping of technobabble.
My head canon has chalked up Pike's wheelchair with its crude controls as a cruel by-product of the delta radiation, rendering his nervous system unable to interface with any other known prosthetic technology, however that would happen.
I can kind of understand some of this.
In DSC, it seems getting cybernetic implants to correct some kind of issue/injury was fairy commonplace... to the extremes of Ariam, who was practically an android with a brain. In later time, this practice seems to have died down, or at the very least, the cybernetics became way better/less identifiable.
In the case of Pike, there may be an amount of personal preference there. They may have been able to give him the Ariam treatment.. but after seeing what an absolute horrorshow Ariam was, Pike may have passed. I also think that Pike suffered a good amount of brain damage that could have prevented some of more exotic tech from working properly without also replacing parts of his brain, which Pike would have seen as a no-go.
In the case of Kirk, there could absolutely be extreme measures... he COULD have had his eyes ripped out and replaced with cybernetic eyes. OR... he could just wear glasses. Given how generally anti-transhuman the Federation tends to be, the latter seems like the more reasonable option. They have medication that can fix eyesight, but if the patient is allergic, it might be better to go with an easier option over a nuclear option.