I can't speak to the new Indiana Jones as I haven't seen it, but the issue people generally have with aging action movie stars is how unrealistic it is. See, Liam Neeson in his recent films, Robert De Niro in The Irishman, Steven Seagal, etc.
Trying to convince the audience that a 75 year old can sprint for 100m after dispatching a gang of thugs, and suffering a gunshot wound is as hard to believe as a 65 year old woman having the body and skin of a woman half her age. People value authenticity and realistic standards to some degree.
Documentary Narrator: Fortunately, our handsomest politicians came up with a cheap, last minute way to combat global warming. Ever since 2063, we simply drop a giant ice cube into the ocean now and again.
Suzie: Just like daddy puts in his drink every morning. Then he gets mad.
Documentary Narrator: Of course, because the greenhouse gasses are still building up, it takes more and more ice each time, thus solving the problem once and for all.
Suzie: But...
Documentary Narrator: Once and for all!
Same. It's been a much more satisfying investment and has made streaming the content I actually want infinitely easier.