Actually, it does - it means there's scrutiny and high quality standards to the point that 15M J&J vaccines were thrown away, and that 62M doses are being checked if they're up to standards.

It means that the watch dogs are watching.

With that said we don't know if other problems will be discovered in the long run, but that's what regulators are there for. In the case of AZ vaccine, they're clearly working as well.