the engagement argument could be applied to every commercial service or product. anything that is sold is getting optimized for appeal/attraction/engagement/adictiveness.
Products optimize for engagement specifically when they exist within the attention economy and their monetization model is serving ads and/or harvesting user data. If Porsche and Rolex can sell you cars and watches you almost never use, I'm sure they're fine with that.
Things will keep getting worse in the US as long as the current nothing is anti-competitive policies endure.