I turned to the parent next to me and asked what she was going to do about all the, you know … I didn’t want to say it. The what, the parent asked. All of the swearing, the F-bombs and such, I said. This was several weeks ago, at the United Center, where Olivia Rodrigo was playing the second of two shows. Soon, if her new album, “Guts,” was any indication, she would be singing F-words and S-words and lots of other B(ad)-words, loudly and prolifically, and to judge by the lines to get in, she would be singing them to many...