Everyone's situation is different.
It really depends on where you are in life, and calculated risks too.
Example:
A young mid-20's married couple is buying a 200K home, both are professionals and its reasonable to assume will have income growth over the next 10 years, I can see them borrowing 30%+ of their income on a mortgage. Knowing their incomes SHOULD grow & make that ratio more comfortable in years to come.
A couple retiring next year, buying a 200k home at 35%+ of their income, maybe NOT such a good idea, if their income will be fixed for the future and not have any room for growth. This is setting them up at a higher percentage for failure (in my opinion) than the younger couple.
I know there are a thousand variables in people's situations, but making SMART calculated risks are key, IMO. Not just going on wishful thinking.
I am grateful to be a good position now, but I remember my early 20's, I bought my first house at 23 years old, without 20% down, used a second mortgage on that portion, had to put a washer/dryer on a credit card, etc. etc.
I was one of those walking the tight rope for a few years, but I had that potential for income growth and rolled the dice. Things turned out in my favor (I'd like to think not by accident, but by hard work and sacrifice). Eveyone has to walk their own walk, but if I would have fell flat, I wouldn't have been looking for a BAILOUT. I can guarantee you that. I would lick my wounds and learn from it.