There are a lot of people who complained when the Heavensward jobs came out that they started at too low a level, especially for those who wanted to proceed through the game on those jobs. I think this feedback is why we got the Stormblood jobs unlocked when you hit level 50 on a job and start on level 50. That way you could just pick up the jobs and keep going from where you are.

As for me, I liked learning the basics from the start, and so with all 5 jobs, I ran through the lower dungeons on purpose to learn the basics, but I didn't need to do all the runs of all the dungeons to level up before I was at the point of "yeah. I get it" to introduce new skills