Buying anything you like within your own means is by all definition good to yourself BUT given the nature of real properties that are permanent in nature and it does not come cheap, it's always better to take into consideration the prospect of it because to be honest unless you intend to stay at that one place for the rest of your life or you foresee yourself not needing to flip your current property to purchase another one them.

To me, studio apartments are designed for 2 groups of people:-
1) individuals who does not intend to start a family for at least twenty (20) years from their date of purchase; OR
2) individuals who intend to generate profit from it (be it, subsale or rent).

My general rule is if you do not find yourself falling into either one of the above categories then avoid.