Third party (you) tracking the user
I'm not tracking users, I'm tracking engagement. I'm not Zuckerberg
Hiding the true target from the user
99.99% of website use a reverse proxy, the target is nearly always hidden. I don't think you understand how the internet works.
Destroying any attempt at content archival
Who would archive a shortened URL and not follow the link to its target? It's not my fault if people don't know how to archive my content.
URL shorteners are not inherently bad.