You are often correct about social media being inane, but I find it very useful to kick around new ideas in off-grid living, dealing with climate change, and puzzling out the disturbing conclusions of modern physics. These are each, in their way, profound. If you find venues, please share. I have had some interesting conversations here and actually thought there was going to be a good discussion once in a philosophy group on MeWe, but it quickly deteriorated.
As for influencing; apparently the issue of whether time actually exists or is an experiential artifact just doesn't grab the general public's attention - I find that amazing. A segment of the population has now heard of carbon taxing, but it means something different to each person at this point. I think it will, and has to be, huge in coming years.