It's not so much understanding the key pairs, it's securing them. People lose keys and burn keys. The average person struggles here. Giving them a management tool helps with that.
The absence of algorithms is both a blessing and a curse. It's great, because people can become their own algorithms and choose their content streams. It's bad because user discovery and content discovery suffer immensely.
Algorithms are not bad. What's bad about them is when they're closed or forced upon users without choice.