Do you think Defender gear should be used? - Monster Hunter World: Iceborne

As per title. Will be starting a new game (bought the original game and Iceborne recently). My friend mentioned that I should avoid overpowered gear (I think it was called "Defender armor") to "feel" the game more.

Wanted to hear opinions from other people, maybe other tips on how to enjoy game the most before starting

Sorry for my bad English.