What a weird argument. We're not talking about suspicious blogospam sites asking for notification access here. By the same token, most email sent is spam. Should we stop using email?
Spammy notification requests should be mitigated with better browser guards for requesting them. The fact that there is spam does not somehow invalidate that there are legitimate use cases people want them for.
Here in California, I got updates about my covid19 test results, and my covid19 appointment information, over SMS or a link over SMS.
This includes what vaccine I received, the lot number of its production, plus information from v-safe[1] and reminders to check in telling the government how I feel on days after the vaccine.