Well, it depends the kind of achievement you're personally aiming for.

If you're just playing couple hours a week/month, and are not even trying to step into raid content, and you're more enjoying the variety of different jobs on the same character, then your statement is absolute correct.

But if you're one of these players, despite the fact that you might be new, are willing to learn and min/max one job on one character, with the goal of end game raiding (hardcore/world first etc) then this statement is wrong, but that player wouldn't be asking tho, he/she would knew already before starting, what race they are playing with, because min/maxing starts already there.

Then you have the player base, that in every game, runs to the forums right from the beginning, asking what class/job is OP. And will return the moment a new patch/expansion or job changes have been made, asking the very same question. These players mostly is what I call "wannabe's" no offense, and these players also will only play a job, that the community declares as OP that day/month/year. Running from one PF/RF to another, trying to get clears, but having no idea how to play their jobs. Then this statement is correct as well, however I wish, we could remove these kind of people from actual raid or party finder content, since it's a waste of time trying to explain to them, how the game works etc.

However, if you have players, that just want to play the way they want to play, sadly this isn't really possible in this game, and will show the moment they step into the duty finder, for their first dungeons etc. You can not, like other games, as example make your healer dex build etc.

Therefore at the end of the day, people should ask for the goals/achievements of the person, before suggestion a class/job to new comers, and give them some points to look up, so they can decide at the end what's best for them. Just saying play what you like to everybody asking, is not going to work 90% of the time. My 2 cents.