bridgetilly has it 100% correct. Parents may choose to give their children financial assistance and pay for luxuries (in my view being given thousands of pounds for a wedding counts as a luxury and not an essential). If it is what parents choose to do, then that is fine and completely up to them. That is very different from saying parents should buy you cars, pay for your wedding and holidays, commit to regular childcare anf/or babysit on demand or gift you many thousands of pounds to put down as your deposit on a house.
Using the word “should” implies an obligation, which if not fulfilled is shirking a duty. Bar university- which I think parents should support if they are financially able to, if only because student support loans are calculated using parental income- none of the things you suggest you are entitled to be given/paid for by your parents are essentials which parents MUST stump up for. If they choose to, be grateful gor you good fortune. If not, don’t act as though you were entitled to it and have been denied your rights.
I do think funding your children to live a lifestyle beyond their means or stepping in every time there is a hint of having to save before buying something isn’t helpful in the long-term. Nor is continually bailing out an adult child who is not budgeting sensibly/running up debts etc.
Helping an adult child in dire straights is a completely different matter and i’d Expect most parents would want to help (unless good reason, such as repeated frivolous spending causing debts). Not one of those instances you gave OP would count as dire straights.
In general terms, I think adult children should expect to support themselves financially. Living off the bank of mum and dad is not wise. I would be embarrassed to have asked my parents to pay for all the things in your list. Mortified, in fact- where is the sense of pride in having achieved your own goals? Except you didn’t: your parents did. Worse, to believe your are entitled to expect all of that is extremely distasteful in my view.