Most people will mostly focus at 1 to 3 jobs, some will master them all, but probably still stick with few favorite jobs.

We are great in things we like, if we change to something we don't like, we won't be our best. Our characters will reflect that.

I always loved games were you can decide your own path, and switch paths.
Sometimes you come to a point in your life that you decide to walk a new road, and sometimes you find out that new road is much better fitting for you.

We usually start with something that sounds great in our ears and mind, but later discover it is not really as great as we thought.

I think it is great we have the ability to adept our characters in such a way.

Some will stay mostly with 1 job, but most people will switch around a lot before they find their place.

Yes it is true we can be anything we want to be, and to me that is a positive thing.
I like the idea that my character will grow and try out different things.
For me this is more realistic then being stuck to one job and later decide to make a new character.

People will remember a good player, no matter if they can easily replace a job.

Unique is hard in a mmorpg, many other players have the same job, no matter if you can job change or not.

I remember a thread a long time ago were someone also wanted that unique feeling of 1 job. He used as example to proudly show his new armor, and then some party members job changed and showed they also had that armor.
He felt bad, and not special anymore.

But people who love gaining many jobs etc still could change characters and show they also got that.

Being special just doesn't fit in a mmorpg, it just doesn't work. If you think you are special, then it is an illusion, because there are many that are equally good at the job.

We all try our best, even the people who aren't good gamers do their best, we all love to hear we did a good job.
Why can't we just enjoy this online world together? Be happy for each other?

I don't need the best players around me, I just want people around me who make fun together, who are nice, who help, such people I always remember.

It isn't about the job but about the character for me.

People who want to play 1 job should do that, maybe getting some skills from other jobs, if needed, but stick with what you like the most, that is the only good way to play.

Everyone got their own opinion of course. And that is why it is hard to understand other people, because we don't experience it the same, we all have our own values.
Who am I to say you are wrong? I can just tell I experience it in a different way.