Because that's not what it does.
Reported-by: Alberto Leiva Popper
Fixes #16829
Closes #17464
## CURLUPART_URL
-When asked to return the full URL, curl_url_get(3) returns a normalized and
-possibly cleaned up version using all available URL parts.
+When asked to return the full URL, curl_url_get(3) returns a slightly cleaned
+up version of the complete URL using all available parts.
We advise using the *CURLU_PUNYCODE* option to get the URL as "normalized" as
possible since IDN allows hostnames to be written in many different ways that