By all means, please start your own blog and encourage others to do so. But let us not pretend this is what most people actually want to be doing. We are all busy and maintaining a website when the house needs to be cleaned and people need to be fed is a terrible waste of time. Silos suck over the long term, but at least they are easy.
This and technology is hard and most people really just want a free text field to scream complaints into the void.