when my aunt was in her 70’s she was supporting both her sons in their 50’s.
One just would not work, the other blew thru about a million bucks and refused to change his lifestyle.
Why she did this I will never know.
My oldest is finishing his undergraduate degree and preparing for law school. He has a plan for his life that includes a career, marriage, family of his own,, etc..
My middle child was diagnosed with an incurable genetic defect that comes with sometimes debilitating symptom surges.
He took e year off between high school and college to get surgery and get the flare ups under control. I told him it was easier when he was young to take time off, than when he is working, paying for a house, etc. He starts college in the fall. He will successfully launch.
My youngest has a different variant of the same condition, as well as Asbergers. He’s extremely smart but socially awkward. He already has a career path chosen in technical writing and programming once he graduates high school. He will probably never fully launch until my husband and I die, or he could surprise us and invent the latest billion dollar gadget. Either way, we expect him to get an education, pay for his car and expenses, and work when he gets older.
There are parents who prepare the path for their children...their offspring don’t mature and expect Mom and Dad to support them.
Then there are parents who prepare their children for the path. Their offspring make it in the world, despite challenges.
Barring a disability or catastrophe, any 50 year old being supported by Mom and Dad is a leach and should be treated as such.