She was popular because she was a safe negro that's why she was selling more than Foxy Brown, Trina and Lil Kim even though their music was garbage too you and made 
tbh , I agree with some of your points but I never will understand why you find any of Missy Elliot or Ludacris music good at all

"Look at me I'm a weirdo doing weird music videos with big heads n shyt" like breh she wasn't creative Busta did all that creative music video shyt before her and his music was actually good

and here's why you can walk with that garbage. Missy's music wasn't safe. And here's why you can walk with that statement. The fact that you are even mentioning Foxy, Trina, Kim is why Missy's music wasn't safe. Foxy, Trina, and Kim sold sex and when they weren't talking about sex it was them talking about drugs and violence. Now all of that has it's place, but what Foxy, Trina, and Kim was more of the norm than what Missy was doing. Foxy, Trina, and Kim made
safe music because being sexy is what society expects females to be. Missy music was more defiant than what they were offering. Did Missy talk about sex? Of course, but she didn't look the role. It wasn't the main aspect of her music. Missy didn't look like a sex symbol and her music sounded nothing like anybody else's. You couldn't put Missy into a box. She was something in between Cee Lo Green and Lauryn Hill, albeit less lyrical.
And by the time she came out with album #5, there was nothing safe about this:
^^^ 10+ years before Beyoncé made the "Formation" video or performed it at the Super Bowl.