These big outages are noteworthy because they _do_ affect people who correctly architected for reliability — and they're pretty rare. This one didn't affect one of my big sites at all; the other was affected by the S3 / Fargate issues but the last time that happened was 2017.
That certainly could be better but so far it hasn't been enough to be worth the massive cost increase of using multiple providers, especially if you can have some basic functionality provided by a CDN when the origin is down (true for the kinds of projects I work on). GCP and Azure have had their share of extended outages, too, so most of the major providers tend to be careful to cast stones about reliability, and it's _much_ better than the median IT department can offer.