I mentioned Tom Cruise because he's one of the biggest action/movie stars ever. We don't really have actors with that much pull anymore, and it's why I didn't mention someone like Kevin Hart or Jessie Eisenburgh or one of the Francos (I forget which). Someone like Robert Downey Jr. is ~5'9". Sure, he's older, but also the lead in some of the biggest action movies in history.
For sports, I think it's better to look at the reverse. Not every 7' person makes it to the NBA or is even good at basketball. But, there are plenty of relatively smaller players in the NBA who do well and some are even super stars. The classic example was Mugsy Bogues, but Steph Curry is 6'2" in sport where height is so important.
Pick a sport where height isn't necessarily a dominating factor like the NHL and there are plenty of players under 6'.
There are players under 6ft, but not 5ft 3in players.
It is not a hard cutoff, but the probability of success with a certain height can decrease exponentially as height decreases.
Kevin Hart is not a leading actor either, he is the comic relief. In the movies I have seen, Dwayne Johnson is the lead actor. For example, Kevin Hart would not be Captain America, or even Black Panther. In fact, I think one of the Captain America movies showed the guy being short before he was enhanced and turned into Captain America.
You would not be able to sell a 5ft 3in actor as the fantasy escape for who people who want to fantasize about who they could be or the leader they would have.
For sports, I think it's better to look at the reverse. Not every 7' person makes it to the NBA or is even good at basketball. But, there are plenty of relatively smaller players in the NBA who do well and some are even super stars. The classic example was Mugsy Bogues, but Steph Curry is 6'2" in sport where height is so important.
Pick a sport where height isn't necessarily a dominating factor like the NHL and there are plenty of players under 6'.