Because "basic" makes people think something you grow out of.
Something boring
Something you leave behind as you get "better."
So people start chasing advanced techniques, flashy moves, and more complicated systems.
But the truth is the most effective movements in Jiu Jitsu are still the ones called the basics.
The vast majority of your training should be spent on high value, proven, repeatable movements - the kind that work when your tired or when your opponent is bigger or more athletic.
Because under pressure, you will fall back on what you mastered.
The basics aren't basic
They're EVERYTHING