I get that people who are earning less find it hard to believe that those on higher wages are also struggling. I think there is a big difference between literally struggling to pay your bills and feed your family, compared to struggling to maintain your usual lifestyle. However, the OP's point is still valid - the reality is that the increase in interest rates and other costs is in some cases totally wiping out people's disposable income and forcing them to make significant changes to the way they live. What was affordable a few years ago is not affordable now.
I will happily give my figures as an example. We have a household income of almost £95k pa which works out at roughly £5300 per month. We bought our house 7 years ago and felt comfortable paying the mortgage with plenty to spare for savings, holidays, eating out etc. Fast forward to now, we had to remortgage in April and our repayments have increased from £1000pm to £1700pm, plus increases in gas/electric/fuel/food costs.
So from our £5300, we spend £1700 mortgage, 400 DH work related travel, 300 petrol, 200 electric, 150 gas, 300 council tax, 850 childcare, 100 for 3 mobile phone contracts, 150 other bills (car insurance and tax, tv licence, internet, subscriptions etc), 800 food/groceries and £200 on kids hobbies. This leaves about 150 for school trips, birthdays, clothes, haircuts, any other extras, down from £850 before our mortgage change and from over £1000 before food, etc increased.
Yes we are incredibly fortunate that we have that £150, we can afford some luxuries and at the moment at least are not worried about paying our bills. But we are lucky enough to have 2 decent incomes, yet can no longer afford a holiday, or to eat out in the way that we used to, and we will have to look at cutting the kids hobbies to give us more of a buffer. I can totally see how OP is genuinely struggling to make ends meet on just over half of what we earn.