IMHO, politics soaks up over 80% of the US attention span. Every day there is a new Trump tweet which then drives the media cycle. Tweets about tariff have businesses trying to manage supply chain uncertainty. Tweets about the Middle East have people wondering if nuclear war is imminent. The opposition is protesting, and the incumbent's supporters are counter-protesting, and all media coverage is solidly dominated by politics.
Celebrities like the Kardashians or Orlando Bloom who attended the Bezos-Sanchez nuptials are part of the top tier of American glitterati chasing the leftover 20% of the USA attention span. Add in the big names that did not attend like Tom Cruise, Taylor Swift, Katy Perry and then layer in the other tiers of celebrityhood, i.e. the B, C, D to Z listers trying to make it in the entertainment industry and you have a sizeable cohort all chasing 20% of US attention span.
Furthermore, all of them are also competing against each other for Disney / Netflix / HBO / Amazon / Spotify production dollars to fund their projects. If Netflix contracts with Leonardo DiCaprio for a $30 million dollar project, then that $30 million is no longer available for anyone else. Entertainment is a zero-sum game.
H&M desperation is evidenced by the fact that they are briefing far-off events (reconciliation at 2027 Invictus) and uncertain events (KC3's eventual funeral), to create a perceived connection to a family that has grey rocked them. As the royal patina fades, as projects fail, as they are ghosted from the Met Gala / Oscars / Tonys / Society weddings on both sides of the Atlantic...the future for the pair looks ever bleaker.