Why can't I move money from Monzo into other accounts of mine easily?

I pay to connect other accounts to Monzo and I can very easily transfer from them to my Monzo accounts.

Why can’t I select them as a destination when transferring money out of Monzo?

Am I missing something?

You’re not missing anything here. It’s their deliberate UX design. Why would they want to lose cash reserve as easily as gaining cash?

I simply save all of my accounts under “Myself" contact and send out using Faster Payments.