The issue is basically with the clickbait-y video titles and tags that many YouTubers use, advertisers have a problem with those. As long as they avoid using the "sensitive" words, they'll be fine. Again,
this explains it quite well.
And yeah, I also don't like how many generalize YouTubers. There are the daily vloggers yes, but there is so much more to YT than them, and they deserve to make a living out of it. I mean, just look at YT channels like Good Mythical Morning - that is basically a morning talk show, and it is very well done. I find what they have managed to accomplish very impressive.
And vloggers can be interesting to watch, just look at Casey Neistat. Dude's awesome. But now I'm going off-topic.