Why can't I hear the bass in death metal and metalcore? Why would someone want to play bass in a metal band?

All the bass does is harmonize the kick drum, and follow the guitar. How incredibly boring and hard to distinguish. Why would someone want to play bass in metal bands that sound like Job For A Cowboy, August Burns Red, Dethklok, or TBDM and TDWP, Killswitch Engage? Basically, I am saying I read the bass tabs in Guitar World for my favorite metal bands are so incredibly boring, then I also read the bass tabs by music companies and again, boring and repetitive in comparison to the guitar parts. What's worse, when listening they are barely audible over brick wall of distorted, and acoustic guitar textures. I am not sure what the bass is actually necessary for in recording music that sounds like those bands.