Bullshit. If your tunes can’t be whistled, they’ll never stick in the memory of mankind. There have been a lot of bands like that in recent memory. The Red Hot Chili Peppers also come to mind. Both have numbing repetitive melody-free bass heavy sludge as their foundation.
The only thing I remember RATM for is:
a) the only people I knew that liked them were hippie poseur self-hating white kids with Che t-shirts, cocaine addicts and drug dealers who lived with snakes.
b) their idiot lead singer is a racist piece of crap with an awful voice.