This is debatable advice…1) Mortgage payments pay a huge dividend- a place to live. At least when you buy, you are paying yourself a portion of your payment. Rent is paying off the mortgage for someone else.
2) Debt is neither inherently good or bad. You use the example of good debt as owning rental property right after you advise not buying a house in point 1 ??? Does it make sense to lease a luxury brand car? Maybe if it helps in your profession.
3) advising people not to save money is bad advice especially if they don’t own real estate. How are they supposed to get cash when emergency arises? What if markets turn and they have to sell of investments at low prices.
It’s hard to give financial advice because nothing is black and white and everyone’s situation is different. My response is just my opinion and may not be worth much more than the digital space it takes up.