Thats the system we have in this country, we pay tax, those taxes go to pay for all sorts of things.
I have never called the fire brigade - but my taxes fund that. Why should people who are silly enough to have their house catch fire be funded by the taxpayer eh? They should pay for the fire services emergency call out themselves.
I won't live long enough to draw a pension so why should my taxes go to pay for pensioners claiming now (bear in mind the money they paid in went to fund pensioners at the time)...
I don't have cancer myself, why should my taxes be used to fund cancer treatments?
If you don't like the tax system, or the idea of a welfare state that supports those who need support... I dunno what to tell you really, go live on the Moon where there are no taxes to pay. And fund your own rocket there?
As for that list of conditions...
PIP is awarded on how significantly a condition affects you, not on what the condition actually is.
So a cleft lip is one of the most common facial abnormalities, with 1 in 700 babies born with it. If only 44 people are claiming PIP for a cleft lip, it must have some pretty significant impact on their lives and be very serious, not surgically corrected in childhood...
And those stats only show the dx condition that person has - it doesn't show what other difficulties they have that may not have a dx to go with them.
My original PIP claim would have 'heart failure' and 'fibromyalgia' on it, but my current one has Ehlers Danlos, Heart failure, Hypothyroid, cervical and lumbar stenosis and a bunch of other things - because I was affected by the symptoms of these things long before I got the dx!