Nigritude, it is their life, but the Torah does not agree that a man can be equally fulfilled regardless of marital status, if that’s your implication.
Hashem himself said “Lo tov heyos haAdam livado; eeseh lo eizer kiNegdo”. And he created Chava for Adam, rather than leaving Adam a “bachelor”.
rebdoniel:
May Hashem guide you on the right path in pleasantness, in all areas, including this one.
Regarding a 30 yr old unmarried guy being referred to as a “boy”, I would apply “lav davka” to that appellation. Anyone at that age who is successful in parnassa, etc. is clearly not a boy. Similarly, a similar-aged female with advanced degrees and a parnassa may also be called a “girl”.
As you mentioned, there are certain times where halacha distinguishes between married and not-yet married.
But the usage of the terms “boy/girl” rather than “man/woman” or “male/female” is essentially for the gender distinction. But it is certainly not, CH”V, a societal condemnation for their great nisayon.