Honestly, ANY platform that obscures links through redirection should be considered unsafe. If you can't verify the target URL before you click the link, then you are asking trouble. Twitter and similar platforms do this so they can track you more effectively. (In the past it also served the purpose of shortening links to SMS-friendly lengths, but that ship sailed like 10 years ago.)
Not that visibility automatically would make it safe, but it is the bare minimum required as a starting point.