What problem does this address?

The confirmation dialog that appears when uninstalling a font feels a little redundant compared to other modals in the Site Editor.

Also, the button text can be quite long depending on the locale. The following shows what the text would look like if it were localized to Japanese.

What is your proposed solution?

I think it would be better to change to a simpler and more consistent UI as shown below.

This is consistent with the UI of other modals in the Site Editor. For example, below is the confirmation dialog when deleting a custom template.