I'm unconvinced whether this is actually better, but it's somehow similar to what poppler does, so maybe it makes sense?

"wrap anywhere" seems really a bit strange. I'd expect something like "wrap at word boundaries", "don't wrap but write across margins" or "enlarge rectangle on demand" from any sane tool. Qt::TextWordWrap would be fine for me.

Just tried it, Calligra Words uses word wrap for text frames by default, too.