These are actually 2 discussions mixed together: should there be a plugin like Hello Dolly and should those lines be removed.

Reading the ticket and patch:
This is only about correcting the text. Removing the plugin is another discussion.

In the patch the discussed two lines are replaced by more neutral lines and also a few corrections in other lines are made to match the original lyrics.
The plugin stays intact, the text is just adjusted and replaced.
No big deal, is it?

Is it trivial, to get offended by lines like: "Find her a vacant knee, fellas"?

The point is: it's not only the two lines here. It's the constant stream of little pinpricks women get in their life. Some made as a joke, some unmindful. Some too small (trivial?) to complain about.

But it all adds up to a feeling of not being listened to. Being second grade. Being put in a place we don't like to be.

So: if we can take two little pinpricks away so easily, then please let's do that.