I’ve never seen anyone complain about Instagram or visa. How can you disrupt services that people love?
I mean, it should be obvious by now that almost nobody cares about privacy.
Then you are not listening to everyone. According to some, Instagram is the most toxic site out there, and Visa leeches fees from their customers. I'm not necessarily in those camps, but I certainly have heard the criticisms.
Industries that are ready to disrupt have loyal followings that they think everyone loves them, when in reality much of society would be just as happy to see them fade. The web as a whole is reaching that point. Whether you dislike the privacy issues, the money-driven nature of startups, the demographic who lives online without engaging with the world, or any other reason... the web is not universally loved, despite the many people who still think it is the greatest thing since sliced bread.
Maybe it is time for some changes.
On top of the people complaining there are those the market hasn't appealed to yet. I'm a very social person but I'm not on any social networks. My mum is (wisely) a bit scared of sharing her data on the internet and also using the internet in general. I've taught her some of the basics so she can eg. receive photos from my by email but she doesn't want to use social networks because she doesn't trust them. I feel the same way. She has plenty of friends she could be keeping in contact with regularly too.
I've seen people wishing they had a Solid-like concept for years, asking for ownership of their data with fine-grained control over who/what gets access to it. And I think that those who haven't wished for this (eg. the general population) will see the benefits once they actually try to use it.
Whether Solid can pull this off is another question but I think this is an area that is driven by demand and it's only through ignorance that people aren't generally asking for this.
Person-to-person settlement is a stepping stone on the way to a better financial/banking system.