Not as important as many people think.
I rarely train a person who I think needs more variety in their training.
It is almost always the opposite.
I usually find myself stripping away the (mostly) pointless exercises a trainee thinks they need, and instead spend the majority of time building up the basics.
I understand that switching up and tweaking exercises keeps things fun and interesting, but nothing is more exciting than adding weight your lifts.
Many people wouldn’t believe or understand this because they have not stayed with an exercise long enough for this type of progression to take place.
I am not all the way against exercise variety, I just want you to get closer to reaching your limits on foundational exercises before you start getting too fancy.
Before you start doing the Side Step Squat Jumps and Spinny Kick Lunges you saw your favorite fitness model doing on Instagram, prioritize working toward squatting 2x bodyweight.