user92626
G.O.A.T.
In my weekend games, I'd say more than 50% of points is 1 or 2 shots! And guess what? people are willing to go at it for hours.Vehemently disagree. Most people give up tennis after just a couple of tires. Some may give her to go for a few months before they give it up for good. Have you recently watched two novice players trying to sustain a rally? A rally of more than 1 or 2 balls us rare. A novice player might be able to sustain a little longer rally against a coach who is giving them very easy, well-controlled balls. But two novice players???
Fuggedaboutit! If they persist, it will take months before most novice players can develop enough control to sustain a rally with each other. Even then, most players will never progress beyond a low intermediate level of 3.0/3.5 ntrp.
Contrast this with badminton, table tennis, racquetball, soft tennis, pickleball and numerous other sports. Inside of 20 minutes, novice players can sustain a reasonable rally. It won't take them weeks or months.
Granted, volleyball skills and hitting a baseball isn't all that easy either. But shooting basketballs into a hoop is much easier to learn than sustaining a decent rally in tennis.
You overestimate recreational tennis. Your requirement or bar for recreational tennis sounds delusional. People do not need to "sustain a decent rally" to keep at tennis. This is why you see old men, old women, 7 years ago kids at tennis courts. You don't see these groups at a basketball court.

If people enjoy tennis and keep at it for a year or so, which is a pretty low requirement for a sport if you wanna talk about requirement, they can literally hit the ball several times in a row which is perfectly good enough for a game or back and forth hitting.