Premium Content Block: Shows Up Even Without Stripe Connection

### Steps to Reproduce

1. Create a new page on a site with a paid plan
2. Add the Premium Content block on the page
3. Publish the page and check on the live site

### What I expected to happen

For the block to be hidden on the site, since you didn't finish setting it up (connecting Stripe, creating and selecting payment plans).

### What actually happened

It shows the visitor/subscriber view and a warning _"Connect to Stripe to use this block on your site."_:


It seems at some point it was working as expected, and asking to set up Stripe first to use the block, as [it shows in our support doc here](https://wordpress.com/support/wordpress-editor/blocks/premium-content-block/#setup).

### Context

Found this odd _"Connect to Stripe to use this block on your site."_ message on a user's site.

### Operating System

macOS

### Browser

Chrome/Chromium

### Simple/Atomic

Simple

### Reproducibility

Consistent

Reproduce the listed steps for a Simple site and compare the live-site behavior with the setup guidance in the linked Premium Content block support document. Done means an unconfigured block is hidden on the live site until Stripe is connected and payment plans are created and selected.

Written by the indexing model from the issue text.