Complacency implies a problem. If I perceived there to be a problem, I'd be happy to vigorously defend it.

I don't view JPEGs or anything else that takes up block space as a problem, given that there is a firm limit on block space.

The only concerning thing I see is UTXO bloat, which was mostly a temporary issue when it was a fad. It's able to be priced out. The OP Return debate doesn't contribute to UTXO bloat, which is why I put it in my "non-issue" category.