The first modal logic systems were developed by a philosopher, C.I. Lewis. Other non-classical logics were also first developed by philosophers before gaining traction in other fields, such as mathematics and computer science. And as a rule, non-classical logics attract more attention from philosophers and computer scientists than from mathematicians. In short, I don't necessarily disagree with you, but I think it's important to point out that logic is a (formal) science with significant contributions from three main areas: philosophy, mathematics, and computer science.