Granted, I haven't personally experienced this problem, but I would still suspect that this is only a very sporadic issue, and the chances of lightning striking twice for you is low. The article you linked is from a fairly obscure site (I've seen them before, but they're certainly not one of the bigger news sites like The Verge, Ars Technica, PhoneArena, etc.), and I wouldn't necessarily equate a number of threads in Reddit and the Google Help Communities to a widespread epidemic of screen failures.
Maybe I'll eat my words later if this proves to be truly more widespread, but this is always the challenge with these kinds of issues. For virtually any phone, you can find articles about a problem that at least some users have had. Here's one about a very similar issue on the S20:
https://www.phonearena.com/news/samsung-galaxy-screens-green-flicker-issue_id133605. Did that pan out to be a major issue for that phone? I can't recall it becoming a brouhaha, so I'm guessing it didn't.
Regarding usage in a car -- that can definitely be detrimental to any phone if you have it mounted on the dashboard in direct sunlight while charging and doing something processor intensive, like navigating. Most phones will heat up significantly in that situation, and the high heat can certainly contribute to potential component damage. If you're going to use the phone in the car for extended periods, I would recommend using it in an AC vent with the AC blowing cool or cold.