Believe me, I so know.
I go onto those threads to try and back up some of the beleaguered posters trying to defend themselves.. I have an adult Ds with ASD who needs substantial home support to work, but who's never claimed any benefit, and was pulled from the school system, so none of their normal claims really work.
I managed forever without but these days claim PIP as (visibly) multiply physically disabled, in order to continue to work.
The goaders believe what suits them, rather than being ill informed, and are especially out in force currently, because there's a GE in sight, a genuine issue of the growth in benefit claims especially amongst the young, assisted dying is on the cards, and punching down is their favorite sport. "We can't afford it, is their favorite cry."
TBF there is a mounting problem that needs sorting out, but we have two answers, sort out the multitude of things wrong with the NHS, education, housing, wages, zero hours contracts, child care, wealth distribution, etc or clamp down and batter the on the people needing them.
I accept I'm not considered "economically viable" by them, but that's because they know the cost of everything and the value of absolutely nothing.