Bitcoin's price doesn't go up because of some magical spell. It does because of it's properties, which make it a superior form of money/asset compared to everything else.

Those properties are largely lost if the majority of us end up using custodial solutions.

The ability to self custody is a must, which is why lightning was an important innovation and further research should be celebrated. Whether or not people do it is a matter of UX, convenience, and education, but the option needs to be there for people who want to.