They’d probably say something like “only the colonized countries need to be economically developed not the core” or “internal colonization is a myth, read settlers”. These people have the critical thinking skills of a shoelace.
Seriously, I’ve heard people try and argue colonies often have higher standards of living than their colonial masters which is one hell of a deranged statement.
They really do infantalize such nations to a massive extent. Definitely plays a role.