Good topic, but its hard to give an answer to your questions.
A lot of it comes down to time preferences. One might argue that the saver and investor is 'wise' and the spender and debtor is 'foolish', but its not so clear. Some people just want more right now, and don't want to think about the future. Others are the opposite - I saw someone in this very forum claim that his investment time-frame was 30 years. 30 years is a long time. Neither case is 'right' or 'wrong', its just a preference. I would argue that in the current environment you should have a savings target of at least 40% of what you earn for safety reasons, but again - its a personal preference.
Then again, there is the 'making good trades' part of finance. Knowing not to buy a house in 2007 USA would be intelligent, buying one regardless of economics or the market would be regarded as either foolish or misinformed.
Regarding term deposits, I don't know why anyone would loan money to the bank for a fixed term, at a fixed interest rate, when the RBA is in a tightening cycle. One can put it in a savings account for the same rate. Yes, contrary to popular belief, you don't get 6.5%. You get nothing after tax and inflation (both thanks to the government) - but at least the money is relatively safe, especially from inflation.