Unfortunately, I think there will always be a large group of people who won’t self custody, regardless of how “easy” it is, for the simple reason that they don’t want the responsibility. They would rather pay someone to hold it, have a false sense of security, rely on oversight and regulation to make them whole in the event of lost $, and not think about it.
Many of my friends who are DIY in so many areas of their lives, lean libertarian in their political views, distrust the government and corps, still won’t self custody. They keep it on exchanges, or hold the spot etf.
Unfortunately, I think they need to get wrecked to change their behaviours with regards to custody of their btc. I try my best, but pain is often the best educator.