Mosh pits / gig behaviour

Yesterday at the gig in Dublin, the show itself was amazing, but there seemed to be a lot of mosh pits happening right by the stage. I was right by the stage (there was no barrier), and at one point I got slammed into the stage with a crazy amount of force by the people in mosh pit, and I spent the second half of the show in a lot of pain and I'm still quite annoyed.

Is it / should it be normal for there to be people moshing super close to the stage? Is this just something that we should just expect at their gigs? Is it okay to shove people, even considering a lot of their fans are teenagers? Later I heard a girl saying proudly that she started loads of mosh pits; I personally don't like them but this all seems a little strange. I know people go really crazy during You! Me! Dancing! and everything but they were doing it even during the slower songs

I go to a lot of gigs and I've seen LC several times now in the past 10 years, but I've never been hurt at a gig before.

Shouldn't we be a bit more careful not to literally injure people? I don't know if this is me just being a little sensitive or unfamiliar with the fan culture even though I've seen them several times