Don't need to buy a cup of coffee for seven bucks, buy a good manual coffee grinder for $100 and 2 pounds coffee beans for $50, you can drink it for 1-2 months.
Don't need to have gym membership, just workout without gym facilities e.g. push up, sit up, running, etc.
Don't need to have a dinner in an expensive restaurant, there's a lot delicious street foods you can choose.
Don't drink, it's unhealthy, expensive and addictive.
After all it depends on each person choice, my choice is the right one while majority of people will pick the left one.
You have correctly noticed everything, but the habits of people are very strong. For me, going to the gym will be mandatory, just because I will pay for it. Going for a morning jog on your own is always rejected by the desire to sleep longer. A cup of coffee drunk in a nearby café is also defining the coming day.
In fact, of course, you can deprive yourself of everything. But a person gets used to the good very quickly, and it is almost impossible to wean oneself from it. Therefore, allocating your finances in advance for vacations, closing loans, renting a home, and even investing will be the best choice. But the younger we are, the weaker we are at educating ourselves. But time teaches, and I think that with age, many begin to understand that some pleasures can really be deprived of themselves.