Jurassic is Jurassic. It's a bad take to call half of the entire franchise a fad, when the movies break box office records and sell a boatload of merchandise. I'm not sure why everyone has such a fractured view on it. Jurassic World may be a soft reboot, but it is literally a sequel to JP, TLW, and JPIII as well. We're in the same universe, nothing has been retconned- only fleshed out. Just because it may not resonate with JP's target audience doesn't mean JW doesn't resonate with the 21st century's version of the same target audience.
The fact of the matter is, it's one franchise. Park and World are not mutually exclusive, and it makes sense that Universal is representing both parts of it.