I'm not sure what point you're trying to make but lots of people on MN seem to be proudly anti credit cards so you're in good company here.
It sounds like the benefits of having them aren't anywhere near as great in Ireland, but in the UK if you don't have a credit card you're missing out on many benefits and life will likely be more expensive. You often see people complaining about issues that either wouldn't have arisen or are much easier to deal with if they had a credit card.
I make several hundred pounds a year by borrowing money for free and putting it in a savings account.
Another couple of hundred in cashback/points that I use to get M&S vouchers.
A few times I've claimed under section 75, eg when Monarch Airlines went bust 2 days before we were due to fly with them
Car hire is cheaper/easier, also hotels often want to take a deposit, so just put it on there instead of them blocking you from spending money.
Easier if you're scammed online, ie they can't empty your bank account and mess up your DDs.
Free cashflow management vs overdrafts which cost 40% apr. Also easier to manage your bank account because all your day to day spending comes out in one payment instead of dozens of dribs and drabs.
Good for online shopping as you can order several sizes etc and are refunded before the bill is due.