Agree with parking sensors being offered as standard, modern cars are getting bigger and safety requirements means viability can be restricted even before limited movement / ability to look over shoulder is taken into account.
Same sort of thing with electric handbrakes, in general controls have become lighter but the mechanical handbrake hasn’t really changed much over the years and requires a degree of physical effort to use, certainly more than the electric versions anyway.
Some manufacturers offer parking sensors as a “free extra” but quite a few have them fitted anyway and more and more models in general are getting EPBs, a good example of features once limited to higher end models filtering down and helping everyone.
The having to buy a pack of mostly unwanted options to gain one you do is a bit of a problems across the whole car industry, lots of complaining about it on many different car forums so not just us lot unhappy about it. To be honest not really sure what the answer is, trying to get manufacturers to create new “disabled” packs could be tricky as its means changing the production process and trying to offer a one size fits all Motability spec could reduce the range of trim levels offered.