Sure, but they are a useful guide to a beginner who doesn't know where to start looking. I played drums for 20 years before I started recording. I had no idea what or where the significant frequencies of my snare were until I found one of those charts and started sweeping through the recommended areas.
This may mark me as a rank amateur, but I also find those spectrum analyser plugins like the Voxvengo one very useful. On my last project I had a killer kick sound that completely disappeared when I added the bass. Using the spectrum I could see the principal kick freq was 100Hz, while the bass was topping at 110Hz. So a quick sweep through the bass, a narrow cut at around 95Hz, and viola welcome back kick