It is a weak plot point. The thing is it's made to seem as if they all have urgent reasons to get to Johannesburg as soon as possible. At the airport the doctor is seen on the phone, upset about the delayyet nothing more is heard about his problem, or anyone else's. Taking that charter flight which would also have cost them more money, as they wouldn't have gotten a refund from the airline was a foolish and seemingly pointless thing to do, and they certainly paid for their decision.
It certainly is a weak plot point as well as being a piece of sloppy scriptwriting which could easily have been avoided.
Why not have the aircraft landing at Windhoek airport with most of the passengers going their separate ways and having the German, the Doctor, Bain, O'Brien and Grace coming together to wait for a charter flight to take them to their home town a few hours away, which is what dozens of people do every day at International airports all over the world. That would have been far more believable and would have improved the story no end.

Oh, I see. Yes, those kinds of comments are pretty silly. Not that I disagree that older films need to be seen, discussed and remembered. But that's got nothing to do with any newer film.
Although it's sadly true that there are many people who think "film" began in 2004 or something and that anything older is, for that reason, bad, poorly done and worthless. And if it was shot in black and whiteforget it! Maybe the person you mention was only trying to express the fact that people need to look beyond movies made in just the last few years and realize there's a huge amount of great, if older, stuff out there.
I recently had a not unpleasant exchange with someone on the
Rear Window
board who said he simply can't get into older films because they're "outdated"and he extended this even to movies made less than ten years ago! I pointed out that if you're going to dismiss as "dated" all movies more than a couple of years old, simply for their
being
more than a couple of years old, then the films he likes today would, under his definition, be considered dated within a few years. I don't think that had occurred to him.

Sorry, somebody compared it to
Spider-Man
in a review and it irked me a little. The reviewer felt that
Sands of the Kalahari
didn't deserve to be forgotten compared to
Spider-Man
's popularity and that it's a better film than
anything
made today. As I said, that kind of comment irks me.

Movies from
every
era have had weak plot points. This has always been and always will be the case with many films.
What could possibly be the connection between
Sands of the Kalahari
and
Spider Man
?

And they say that today's films have weak plot points
At least
Spider-Man
(2001 movie, which some people compared badly to this movie) didn't have such a crappy plot point.

It is a weak plot point. The thing is it's made to
seem
as if they all have urgent reasons to get to Johannesburg as soon as possible. At the airport the doctor is seen on the phone, upset about the delayyet nothing more is heard about his problem, or anyone else's. Taking that charter flight which would also have cost them more money, as they wouldn't have gotten a refund from the airline was a foolish and seemingly pointless thing to do, and they certainly paid for their decision.
The other question is, why was O'Brien so anxious to join them? He arrives in a hurry, and is carrying a suitcase we later see is filled with cash. Yet here too, nothing more is said about what he's up to or running away from.
Of course, all this comes under the heading of, "If they didn't take the plane, there wouldn't have been a movie." Even so, giving each of them a motive would have helped.

What a great film that would've made .