Most teams already write in Notion. Copying that text into a website is the step where it goes stale, because nobody does it twice.
Connect Notion and the site reads from the page or database your team already maintains.
A CMS that nobody logs into is worse than no CMS. Writing where the team already writes removes the discipline the alternative requires.
Notion integrations only see pages you explicitly share with them, so the blast radius is whatever you chose.
Only the pages you share with the integration. Nothing else.
Read when the site builds. Live reads are possible where it makes sense.
Yes. Connectors are part of the plan; there is no separate integration fee.