Your perspective is a path with only one logical end. That nothing you do or think or believe matters unless someone you're attracted to finds it attractive.
That is not how I or most others live. We take pride in and derive satisfaction from our accomplishments without the need for external validation.
Yeah, only I care whether the solution I found to a problem today was elegant, or whether my kitchen was pristine and well organized after I prepped for next week's lunches, but so what? I care and it injects more than enough meaning into my life to be worth it.