That was probably sarcasm with the Meta, but just in case it wasn't or someone else sees that and thinks Ohhh Noooo I Gotta Go For Meta...

Half the fun is having weapons appropriate for several different situations.  It's probably just about necessary for this new DLC if it's anything like MHW: Icebourne was.  You gotta take advantage of every...advantage...you possibly can unless you're just a god with your weapon of choice.

The first time I played Icebourne I tried to push through past Large Ice Tiger with Pre-DLC End Game gear and it didn't work for shit.  I eventually barely beat him.  Second time around I had farmed up some DLC gear and some 4 Slot Gems and had a weapon that should help me.  Basically some of the later stuff really really really justifies making extra weapons just to fight certain monsters or certain monster types.

At least until you get Fatalis gear and just shit on everything.