And as for Actually anyone CAN do it. If you don't want to live in the most desirable and expensive area and can restrict your outgoings whilst you save for a deposit.
No, actually, not anyone can.
DH and I for example. We're certainly not living in the most desirable and expensive area. Not in a major city, though we are in commutable distance of one. We need to be, as that's where all the jobs in my line of work are. When we first moved in together we were renting and saving towards a deposit towards a house. We could afford to do so, life was great. Then DH suffered a serious head injury and was off work for over a year. Shortly after he was back on his feet and back working, my Grandad became ill. Moving to a cheaper area wasn't possible as I needed to assist in caring for him. After he died, my Grandmother's health began to deteriorate, and again, I had to stay nearby to assist in her care. After Nan died we began once again looking towards saving, and considering moving to somewhere more affordable to us. Though I'd have preferred to stay put, as my Mum really needed my emotional support after Nan died. But I was willing to travel to be there when she needed me, if it enabled us to buy a house. Then my health went to shite. Many hospital admissions, signed off work, not allowed to drive due to seizures. The loss of my income totally fucked up our plans.
So no, not anyone can do it. Sometimes shit happens to us that wrecks our ever so carefully made plans.
And before anyone says it, I'm not even a touch jealous or bitter. When my friends have bought houses (some with parental help, some without), I've been genuinely delighted for them. But I just need to point out that not everyone is in a position to buy, and it's often absolutely not due to prioritising holidays/avocados/spending 100 quid on a night out every week.
Apologies for the epic post. In response to the actual OP, well, no, YANBU to think that house buying is the norm in your world. If it's what everyone that you know has done, then of course it's the norm. Why would you need to even ask?