Not true. I know bitly and googl have those info pages, so I'll check them out when I am curious but am not sure whether I want to alert whereever it leads. I know I'll get more info at best, and don't lose anything at worst. For random URLs, I guess I could try whois lookups, but I'd be much more likely to just check it out than with a short URL which is easily checked out.
If seeing that the bit.ly URL redirects to a known-urlcanary domain would put you off visiting the URL, then seeing the raw known-urlcanary domain (not behind bit.ly) would also be enough to put you off visiting it.
So, doesn't this mean you need to have a bunch of domains, none of which look like urlcanary domains? If you hide behind something like namecheap's whoisguard (customer, not affiliated with them), that would do the trick, right?