Why are hard links a bad option to protect a file from deletion?

Question

linux

I came across the statement that creating a hard link to a file is such a way to protect it from deletion. But as long as there is a hard link, the content will remain. Why is hardlink protection a bad way? Because of the names?

Answer 1

It will only "protect" the content from unlink (rm). But it won't protect against overwriting at all, like:
echo > file
Even if you have the contents of the file aside, there is no information about the original name and position.
Make a backup.

Answer 2

because the original file will be deleted