They explicitly state they’re talking about considerations of being a website admin.
For instance your can be an EU Spotify account holder and request your portfolio from Spotify and they have to dig up all your data and give it to you. You can also ask them to forget about you and make them delete all that data. You can make this request to anyone that holds your information without reason.
If you collect information about European citizens, whether as a primary aggregate, or simply to manipulate and present it, you must comply. It is not an option. The other implicit option is don’t collect data belonging to European citizens. For a website admin this is done by preventing Europeans from accessing your site.
Osa above says they might be good because it only matters if Europeans know you have their data and you’re not obligated to announce it without a GDPR request. Which is hard to do if you block them.