The example you gave shows exactly how loans taken from the bank or from family and friends is being put to good and proper use.
Good debt and bad debt? You don’t have bad debts as a borrower, you incur bad debts as a lender giving out loans that won’t be paid back. That’s bad debt.
Loans are majorly taken out to help solve an emergency or for business purposes. If you end up spending the loan on irrelevant things, that’s a choice purposefully made knowing the loan has to be paid back.
There is too much talk about Debt and its impact on life with in different regions we have different view about this all because in few countries peoples don't like this and feel this is not good for anything but still in few countries we have good things about this all which bring good changes but for this all we need to make a solid strategy which helps us for having better use of this all without any strategy and pre-planning things can go into wrong way, and you can go into deep trouble.
Even I am personally having good changes with my debits and this make me to do many things which were never been possible because I have short of money for long time so mostly I suggest just go ahead, but you need to think about this before jumping and having better use of this because many times we have terrible impact as well, but this all depends on the user how he is going to do this all.