If you auto merge those PRs you're back to square 1 as you're not vetting your dependency updates. And if you don't, you incur operational overhead unless you put in a fair amount of effort centralizing. Wrote a couple of posts that touched on this https://developerwithacat.com/blog/202604/github-actions-sup...
Valid point. We have minimum age requirements set on some rules to avoid absorbing every latest change instantly.
How many people actually audit the code changes in their dependencies when updating them?