Yes, if we calculate what we have spent, I think it will make us regret it. This is just a mindset that is usually given by motivators to diligently save or invest. Unfortunately, the real situation is not like that. Sometimes we need something to make us feel better and more enthusiastic, and to make our minds feel fresh again. However, I agree that smoking can be detrimental to a person, because it has so many positive alternatives, especially at a young age.
Indeed, there is no harm in reviewing the expenditure that we have used for the needs we need and after that we will be able to realize whether the expenditure we have used has been appropriate for useful things or not and if we have found that our expenditure has not been for things that are useful for us. Of course we have to be able to learn it and we can avoid it so we don't spend money on things we don't need.
Yes, of course we need something that will make us feel better and indeed there are some people who think that smoking will make their minds fresher, but this can also damage our health if we smoke in large quantities and this also makes us have to spending more money to buy cigarettes and it would be better if we could reduce it so we can set aside some of the money we have so we can save and also invest.