Privacy is paradoxical, so I don't think anything should ever tout privacy as a feature or benefit, it should be incidental to something superior for its own reasons.

Things like Monero and Tor for example, privacy is the feature benefit, but that also makes them less private because it attracts a smaller anonset (retards) because they're otherwise useless, and more relative surveillance because it's a honeypot/target rich with said retards.

Privacy as a feature also leads users to stray from privacy practices due to a false sense of security. These undiscerning users fulfill the paradox of deanonymizing private systems through improper practices.

Taproot channels are often cited as a benefit to Lightning, but to your point nobody cares so use is negligible... and if we did get a flood of new privacy focused users, they'd quickly deanonymize an otherwise private network today through centralized swap services and ignorance of utxo management.