as everybody else in Italy, I had to study the Divine Comedy (which is an incredible work, and I'm glad I had to), and part of doing that is learning multiple interpretations of a single line, variations of people who have read and re-read the work over centuries. It really easily convinces you that, if the art itself can have a given meaning, still many interpretations are bonkers and there might be no hidden meaning at all.

I am sure the same applies, to e.g. William Blake.