Only if people provide reasons for why they think it is bad, but with people along the lines of "Header-only? Eww. Sucks." you cannot.
To comment on this, I have a couple of header-only projects I have written. It makes sense in some scenarios. Sometimes I want no external dependencies and a single header file interface.
To comment on this, I have a couple of header-only projects I have written. It makes sense in some scenarios. Sometimes I want no external dependencies and a single header file interface.