It's not easy...but if you shilled affiliate links on social media for a while and came up with a reason for people to follow you, you could make enough to live on likely.
Yep, you can but it isn't from posting pictures of your lunch or thoughts about politics or whatnot for most people. it is hard shill.
Oh, it's hard shill indeed. And much of the time you might be earning less than "minimum wage" in any first world country. Of course you probably can earn enough to live in cheaper countries.
Edit: It is of note that most YouTubers actually have to do something like this, in addition to product placement, because YouTube doesn't pay as much anymore, and demonetizes their videos without warning and often without clear reason.
This reminds me, I was meant to add that if everyone starts doing it, the value of the work decreases accordingly too. So, there is only so much space before saturation.