Boring is why you have incentives. SE provides incentives to get you into dungeons to help new people even if you don't care about helping people.
Also...I did not say that at all. Please don't twist my words. There is a striking difference between content that was recently released, and content that was released long ago but that one is experiencing for the first time. New players should not have to skip content that would be their first time doing and suffer through long queues and miss an enormous part of the game just so that old players can have a little bit of extra content.
Again, catch up with anything. In most MMOs, if you haven't done something before the next content comes out and want to, you're out of luck. You'll likely never get to experience it. New players would not have the chance to catch up and do this content if SE subscribed to your view, because by the time they got to the level to do it, the populace would have moved on. They would have to go without and be forced through a shallow, unpopulated, and dead experience just so that SE could devote a minuscule amount of extra time to a tiny amount of new content for people who were lucky enough to have been playing long enough to experience everything.
And yes. Many do complain. But what happens then, if they got what they think they want?
They would get to HW and exhaust the content they have to play, and become one of the many people complaining about having nothing to do after finishing HW. You can't gut an enormous part of the game's content and then expect the new player experience to be very fulfilling or lasting.
I encourage new players to take their time and enjoy the game, because the sooner they get to HW, the sooner they find out they're running out of things to do.
Oh, and CT is optional last I checked. New players who don't want to do CT don't have to. But new players who do want to do it would be out of luck if SE had your mindset.
As a veteran myself, I don't mind going back and doing content. It's definitely preferable to the alternatives (like WoW's cash shop leveling, other MMOs' dead and abandoned early game dungeons and areas, etc).
I think you're overestimating the amount of development time SE could add to new content if they gave up on adding simple incentives to do old content such as light (which takes little time and effort for them to do), and underestimating the impact it would have on the game if new players were left to fend for themselves and forgotten about.