Miscreants galore a trying anything and everything to trick uses with fake pages with noticed to allow or refuse alerts and when refused it cycles. These type of pages are setup to trick users.
Google does not seem to be able to detect this type of malicious page. Allowing notifications will invite spam and worse.
Many websites use alerts to track issues. These can then be used as background for new stories. Google Alerts are automatic and are summarized in a digest.