sadly I still worry about that. An install fails once, you you hard code the --force flag in all your CI/CD jobs and we are back in the same place again. I am not sure what the answer is, though problems...
Adding a hardcoded flag is not the same as asking the user if they want potential malware. If CI/CD is broken they should revert the change to pinned dependencies instead of trying to install a bleeding edge version of a new dependency that hasn't been scanned yet.
Then it will be downloadable and then it's up to your own security scanners to catch it. If you find it, it should be reported to pypi and then the scanner should be improved to catch that kind of bypass the next time it comes around. In such a world I don't think pypi is acting negligent.