Torishima is speaking based on his personal experience getting manga published in the U.S. You may call it a misconception, but it's a historical fact.
Certainly, things have changed. Yes, there are folks on the left who complain about sexualization in media, etc. and I imagine that is a concern for publishers too.
That said, you don't need to get a time machine to see current examples of manga and anime being banned or removed from libraries in the U.S. due to conservative pressure:
It seems like school book bans are beginning to turn their focus to manga. According to a new report from Florida, a middle school in the eastern part of the state removed the manga from its library after receiving complaints. The manga is also facing a ban in the Elmbrook School District in...
comicbook.com
Personally, I find some delicious irony in a conservative group called "Moms for Liberty" trying to restrict the freedom/liberty of other people to find certain books in libraries.
For that matter, here's another yet somehow particularly hilarious example:
A school board in Florida has banned Sasaki and Miyano after a person complained, calling the popular BL manga series "offensive."
www.tokyoweekender.com
At the end of the day though, I find myself agreeing with Torishima in that the U.S. is often acting as a ridiculous country, period, regardless of which side the pressure is coming from.