I think it's a gaping wide opening to disrupt the current paradigm because:

• demonstrated demand for event aggregation, hence why so many people do it manually within narrow niches
• event data is factual, verifiable, with a defined oracle hierarchy (a URL or the person/org who controls it)
• in the past the unit economics of scraping event data with traditional parse engineering didn't work
• end consumers don't need to create Nostr accounts and mess with private keys to get value from Nostr clients, they can be eased into it, only generating keys when they want to engage with the content)
• the data is overwhelmingly public, organisers and promoters want it to be shared to reach new audiences outside their own channels
• ad funded social media can't do it because it's contra to the engagement model. If you're enjoying yourself at an event you're not looking at your phone. And event ticketing is a terrible business with low margins so they don't see it as an opportunity. That's why they have tried multiple times and scrapped their attempts in favour of the TikTok model, intentionally breaking real world networks built around the Dunbar number in order to increase the surface area of content a user can engage with.
• real world communities are homeless, fragmented into moderated silos to hide bots, spam ,and disruptive voices, which perversely cuts off their own reach, making them more dependent on social media which they often hate
• easy to monetise, model it on Substack and Patreon, disrupt the ticketing market by converting regular event goers to monthly subscribers of real world creators in return for perks and access

And so many more reasons.

Due to private key illiteracy Nostr has a massive uphill battle that will take decades, but there is this gaping wide opportunity just sitting there to cut decades down to years, because the one thing that is universal is that people meet at physical locations scheduled in advance, i.e. events.