growing up?

at what point do we finally grow up and become adults?

i understand the legalities of eighteen, but i wonder when it is we mentally mature and accept responsibility?

i know a few adults who are more than capeable in the workforce, yet become utterly immobilized when certain things happen to them which renders them into whining snivelling brats.

i fail to understand how they can have successes in the workplace and promotions, yet cant handle a spider nesting outside their home, or a humidifier leak in an unfinished basement, or a potential gas leak without being reduced to tears and calling someone to whine about it without actually taking initiative to DO something about the problem.  it seems easier for these people to cry and whine and moan and just do so in a manner to try to appeal to the other person's emotions and instinctive protective nature from bad family patterns of enabling.

these same people are always quick to tell you how successful they are but seem to do so in a manner that would imply that what you do will never be quite as important as what they do daily.

they seem to make excuses for any behaviour they are called on such as telling other staff that they were never trained how to treat support staff.  even simple things like going to a fitness facility becomes excuses of "if only" the shower was working at work, instead of openly admitting the obvious.

it just seems that work places and life are both teeming with these pseudo-adults running amuck with veneers of marble, yet are filled with sand bracing for the slightest breeze.