I feel like I'd be doing a disservice to the company to suggest they don't consider their songs and choose themes they think will create appeal. Companies think through their choices carefully, and plan how and who they're going to market their products to - their decisions aren't random, and having a character seduce the viewer/listener is the oldest and most commonly used tactic in the book. In every case I think it's more likely deliberate than not.

Vocal synth companies do this constantly, they want to create something appealing, and attractiveness is the most basic source of appeal.
The most shocking thing about it is only that Anri is the first to lean into that concept fully as an Engloid. In hindsight I'm surprised 'sexy' demo songs took so long to reach us. It's not necessarily an insidious thing (go on dreamtonics. make male ai hunky). But I'm not gonna believe that companies are too innocent to use attraction as a marketing tactic. They know, those with the funds are making wedding figurines! (Crypton smh)