Hey, maintaining and providing support for a server that is de-coupled from underlying external integrations (storage, payment, secrets, email, ...) is what requires bandwidth.
Also, self-hosted consumer products are hard to sustain profitably. Avenues for monetization are low.
Given that our long term target audience is people like my parents, we did not see enough value in investing in a self-hosted variant, and wanted to reduce the number of distractions.
This is not to say that we are against the idea of a self-hosted variant, just that it is not a priority for us right now.