There's a great line from the movie "My Favorite Year", where Peter O'Toole, playing Alan Swann (a thinly disguised Errol Flynn well past his prime) is getting ready for an appearance on a 1950's live comedy TV show called "Comedy Cavalcade" starring King Kaiser (Joseph Bologna playing Sid Caesar hosting "Your Show of Shows"). As the time for the show approaches, Swann finds out that the performance will be live and in front of a studio audience, and he has a panic attack, and he says, "I'm not an actor, I'm a movie star!"
Burt Reynolds wasn't an actor. He was a movie star.
Some skilled folks can be both - Meryl Streep, for example. Tom Hanks. Clark Gable. Marlon Brando. But there is a long tradition of movie stars that might occasionally rise to an acting challenge, but are mostly just movie stars. Errol Flynn. Gene Kelly. Sean Connery. Kevin Costner.
Reynolds was certainly an icon for a good decade or more - the biggest box office name in the late 70's for about four years running, if I recall correctly. He had a nice resurgence in the 90's as well and stayed in the pop culture stream with his 80's/90's TV appearances. He had a good run.