Yes. Life is a joke if you are not mentally robust to want to continue living till old age and doing something / anything meaningful along the way.
I know my life is a joke because I have inadequate mental robustness for any kind of personal / professional interests and capabilities. Essentially, I am always mentally dependent on needing a safe, comforting space to stay away from the problems of real life. This doesn't mean I am always like this. I have had my moments, days, weeks, months even.
But my mind has never been strong enough to keep me going for years at a time like others do. I experience extreme mental fatigue and complete disorientation because my mind is internally not capable of handling the tougher aspects of life : sticking to a job, having healthy relationships, having healthy hobbies etc.
It's partly by being dependent on my parents' house that I have survived so far.