Insult aside; this woman clearly could not have imagined or anticipated anything else; but a refusal to board that plane.
'Equal treatment' allows that this silly lawsuit was brought about by a more than 'silly', woman. Silly and wily. . .makes more sense.
Why should she expect this treatment? I've seen folks board planes with assistance who were almost dead, then fly by themselves to their destination without issue. Their wheel chairs were folded up and stored until they landed. If she's a Thal. baby, then she's been around awhile and has probably flown before. (I know that this is an assumption, but no more than your assumption that she wouldn't know the deal. And no more than another poster's assumption that she's sued before or that she's even a Brit. Heck, posters here are assuming that she just now filed the suit, when it may have just now been settledafter being filed years before.)
There are silly lawsuits, and then there are those cases that lawsuits were intended to deal with. I don't understand why so many assume the worst. (OK. Yes, I can see why. But it's still not a reasonable habit.) Yes, there are @sses who look for every excuse to sue, but there are also real people with legit claims.