In that case, you could also argue that until the pension ages for men and women were equalised, men had always 'lost' 5 years of their pension (despite having had to pay in for 5 extra years to receive a full pension). Is that the patriarchy at work as well?
The rules were changed. At some stage someone was going to 'lose' some of their pension. I suppose it would be possible to arrange it so that changes only ever apply to people who had never yet paid in, but then the changes would have to have a 50-odd year lead-in time, so that's not really practical when changes need to be made on a shorter timescale.
But I don't think even the WASPIs are saying nothing should have been changed. Their claim is that when the rules were changed they weren't given enough information early enough to plan for the rule changes.
As others have pointed out, younger people are going to be working until 68 or later to get their pension, if they get anything at all.