2. Taking a huge loan out when you have little prospect of being able to pay it back is a persons own responsibility. I've been in debt, I know lots of people in debt, and in almost all cases it's due to my/their own poor decisions. This conversation changes if you live in the US and experience medical debt (not something we deal with in the UK).

3. Again, depends on your jurisdiction, but housing is typically available in some form (just not ownership) even to people with poor credit ratings.

growing up, this has been my idea and i cannot imagine tying myself "in future" to an item of convenience or luxury if i can't already pay it in cash.

a large part of it comes from the reason that i am not a government employee who traditionally have enjoyed a "get employed and you will get your salary till you die", those people can certainly portion off their salary, future even because there is essentially 0 risk of being let off. OTOH, being a professional with no "assured" income, this is not possible.

i know people, like many who sport a credit card, own a vehicle for the lulz and the "experience" of making heads turn but i can't care less about neighbours idea of me owing or not owing an iphone or a top line car. meh

Student loans, if that's what you're referring to, are basically 0-risk because they'll either get wiped out by the government at some point, or the person will eventually pay it off within their lifetime; this is helped by how you can't discharge student loan debt in bankruptcy.