I'm in the group that thinks legitimate businesses should have websites. But we are a dying breed. It's actually better for these businesses to be on social media because that's where the traffic is at. I can't get someone to see my website unless they just happen to stumble across it most of the time. But I can pay to promote a social media post so that thousands of people see something about my business. And I can target the audience that I want to see it. Pretty simple really.
The bad rap that Facebook always gets is that there is a bunch of stuff you don't agree with or don't want to see. That's mostly your fault. Get rid of the "friends" that always post the crap that annoys you and most of it will go away. "But what if they see that I unfriended them and it upsets them?" Uhhh...first of all it's your feed so just tell them you didn't want to see what they are always posting or if you can't be honest there are steps you can take to not see that stuff.
And yes it's going to show you what you most often look at. So if it's all crap then that's what you always search out. Mine is all music, cameras, fishing, sports and since I've been looking for some boots there is a lot of that lately. Not much stuff that rubs me the wrong way because if it looks like it's going to I just roll on past it. Focus on what you like and it will keep up with that and it's what you will mostly see. My Facebook feed has more about fishing and less about politics than this place and that is sad to me.