I wasn't speaking about your friend . I'm writing about the initial post about people working at Target that you made. I would rather a senior center playing cards, pickle ball etc than working at Target myself if i had to choose.
Now if i had a job that i love, for example if i possesed a brilliant legal mind and i'm still helping out at the firm. However working less than when i'm 70 but still working and enjoying it. Or I'm mentoring younger people in Finance or another field, a career i enjoy a Professor, perhaps a business owner. That's different imo.
And a guy I knew in his 80's was a PE and did (among other jobs) all the drawings, engineering, submission to building dept, supervised work on installation of an elevator for local church.
Another 80, retired lawyer, did volunteer legal work for low income people.
Both didn't need (or take) any money.
However, a know 2 who felt that, as you posted, "Greeting people at Target and other places seems a horrible idea" felt that such a horrible idea was superior to cutting back on medicines, food and paying rent (go figure about the priorities of some people).
As for me, I waited until my late 60's to retire as my work became less intellectually stimulating (I didn't need any more money) so although I no longer hunt (deer) I still fish, hike, run, exercise daily, read a lot (4 newspapers and books), take an occasional college course, monger and post on UG and (very) occasionally another site.
My experiences with doctors is once a year a physical and once a year a full body skin scan