Fair enough, I can see why you would think that, and so do a lot of others, however I disagree. If self custody is difficult, then the solution is better protocols, improved UX, and more informative education; not using the crutch of centralised custodial services, which will ultimately lead to failure. This is why we have Bitcoin in the first place.
Discussion
Yes, new tools with better UI will be required. Why can't custodial solutions be a part of the landscape while new tools are getting built?