Because mainstream media's biases are beholden to the companies and government people causing us many problems. They also self-suppress critical stuff that could result in reform if it had people's attention. They also have this weird habit of running and heavily covering shock stories when critical legislation or business events are happening, making citizens miss the chance to act on it.
A media more independent from corporate and government interests would have less of these issues. Especially suppression. Then it's just a matter of gauging accuracy and bias of each.
I didnt say they do nothing of benefit. I use them since they're most of what we have. Your claim also doesnt counter mine in any way. Large, well-funded, independent media wouldve done the same thing if we had that instead. Further, it would be more likely as MSM continues to shift from journalism to just sharing anything that will get views. Most MSM just copies stories of relatively few journalists since that generates the most ad revenue at the lowest cost.
A media more independent from corporate and government interests would have less of these issues. Especially suppression. Then it's just a matter of gauging accuracy and bias of each.