Social media is not journalism. It’s an algorithm driven click-bait echo chamber full of 5s long “hot takes”.

Anyone who builds their model of the world primarily from social media without grounding it in actual journalism is doing themselves (but mostly the wider society) a huge disservice.

Who on social media, and paid to do investigations how? And with whose algorithm recommending it with what incentives?

It's not journalism to only read the primary sources you have time to read. That's not proper research, it's narrow and limited. By definition nobody has time to do their own journalism, any more than they have time to write their phones operating system themselves.

Maybe, but the opposite might also be true. There is value in aggregating sources and filtering signal from noise. The value of such should increase with the growth of social media. Maybe you won’t reach everyone with such a business (see the decline in newspaper) but some will always pay for this