Agree. Software industry has become so huge the last 20 years that it's not enough to just say "Software." But I agree with you. If it's simple mobile app with eye-catching animations and cool buttons, that software leans more towards art. But if it requires complicated algorithms and AI like those in Stock Exchanges, then it leans more towards Engineering. But there is both Art and Engineering in almost all software.
Clearly some software is more art than engineering. And clearly some software is more engineering than art.
Everything else is in that muddy gray area people like to argue about instead of getting stuff done.