If “this” is the signup nag, then yes. It’s largely ignored because the nag can be easily closed and only non-expert users don’t understand this.
Scroll a little bit, the X is in the top left. We made that change in 2017 or so.
Just confirmed it still behaves this way on .com for keyword landing pages and direct links to pins (e.g search results, or shares from users).
Here are some test URLs which should all be publicly accessible without an account:
User page: https://www.pinterest.com/joshenders/
Board page: https://www.pinterest.com/joshenders/herpetology/
Snark aside, most people clearly aren’t expert users.