Matt Walsh is a religious Catholic who is anti-abortion, anti-gay rights and thinks the main issue with teenage pregnancy is all those fertile teenage wombs are being filled with seed by men they're not married to because society has now got an issue with marrying off 16 year olds
That obviously plays well to his audience, but he doesn't need to be censored here. He's one of those nutty yanks who sperg about religion, they don't get much traction in the highly secular white middle class English society. People wouldn't take him seriously, they'd just roll their eyes at yet another frothing mouthed theocratic seppo.
JK Rowling meanwhile is a nice middle class lady who ticks all the boxes except for this one about "actually I think there are biological sex differences". That's why she's much more effective at peaking normies.