When I was studying in the university far from family and relatives or even family friends, I had a difficult time. Money is extremely scarce. Early mornings are usually for hot drinks-- coffee, chocolate, milk, tea, or whatever. I realized that what made those drinks important is that they are hot. So I learned to drink only a hot cup of water which I could easily ask for free from the eatery in front of where I stayed.
Come meal time, I would also request that the serving be made in half. That's to save money. But I had the money. I always made sure I have some. Emergencies and unforeseen expenses may arise anytime. So I need to have money all the time, but I won't touch it. Ironically, it also gave me hunger, inconvenience, discomfort at times.
My story is rather uninteresting, but let me know yours. Does this idea also apply to you? You could have the money to buy a new car to replace your old and broken one but you prefer not to touch it. Do you hold yourself from spending what you have to the point of depriving yourself of what you deserve? Do you keep significant savings for occasions that might only happen in your imagination? Or at what point would you allow yourself to be drained of your last penny?
Not sure how true that story is and might be a bit of a myth to try to prove a point. Some of the stuff you say is a bit silly and being too frugal can bring a lot of misery in life, you need to really enjoy the little things. Hot water without any flavoring is completely different to things like hot chocolate or coffee. Depriving yourself of an adequate food portion can be equally dumb as having energy in your body can help you be much more productive in the long run, it is the fuel for your brain and muscles after all. Having an emergency fund of money is definitely useful and you should not touch it, but it can be stored in various forms - instead of putting it into a company that might return 6% in yield you might settle for a bank account paying out 2% in each to make a little bit of profit from your safety net.