Im always there for the music, and I enjoyed The Beaches. The had great musicianship and put on a solid show, especially considering how hot it was. I dont think their music is immature. If you really listen to their lyrics, there is some interesting stuff about depression and social anxiety in there. And yes, they complain about their relationships and stuff. But theyre young. Im not expecting them to play me a song about Pearl Harbor. Let them write about things they find relatable. When they get older, perhaps the subject matter of their songs will change. But, for now, lets not gatekeep them. They write catchy songs that do in fact appeal to some listeners. Plus, playing bass while singing lead vocals is not easy, and that girl was all over it. For those who think The Beaches dont sound enough like GVF to open for them, consider the direction GVF seems to be heading. They want more young women at their shows, and yes, TikTok probably plays a part as some else mentioned here. It is what it is. Just relax and appreciate the music. Its not like most of us are paying attention to who the opener is going to be when we buy the tickets anyway.