Royce Gracie is on this list?
Have you ever seen him dropped by a punch or kick? Has he ever been hurt or stunned by a strike?
He used punches and kicks to set his opponent up for a takedown or clinch where he would position into a BJJ exchange.
Royce didn't show or employ the techniques that today's top fighters do because is it wasn't necessary then. Gracie used striking as effectively as it could possibly be employed to put the fight exactly where he wanted it.
To his credit, I don't believe he's ever been cut, bruised, or even remotely affected by strikes - except for during a fight he lost to Sakuraba. He took some damage there.