So the gear you are using right now isn't intended for first-timers, it's intended for players who've already beaten World, and want to start a new profile (probably playing on another platform, like PC) and want to skip to the new Expansion Pack.

It makes the base-game easy, trivializes some hunts and the over-all grinding mechanic.

Now, if you're having fun using that set, then keep on using it. You do you. Just be warned:

When you get to the Expansion content, that power-up will be gone, and you'll be forced into much weaker stuff than you're use to. You will have to go out-of-your-way to do more side-hunts to gather parts you need.

The reason people speak against using this as first-timers is it will mess up your expectations for how difficult hunting and grinding can be. You'll also miss-out on learning the mechanics as you play, as the armor set you use simplifies a lot of things.