That statement couldn’t be any further than truth. What is important that CPU can accomplish all the given tasks in a time period that your monitor refreshes itself. In my test page, using a 6 year old desktop with average specs, Chrome can handle 20000 draw calls per frame requesting material index while maintaining 60 FPS.
The point is, when it comes to draw calls, the time to fulfill these calls is important NOT the number of calls.
I hope I made it easy for you to understand what I’m trying to say.