Security threat with `home_url`?

The codex states:

Always use esc_url when sanitizing URLs (in text nodes, attribute
nodes or anywhere else). Rejects URLs that do not have one of the
provided whitelisted protocols (defaulting to http, https, ftp, ftps,
mailto, news, irc, gopher, nntp, feed, and telnet), eliminates invalid
characters, and removes dangerous characters. Replaces clean_url()
which was deprecated in 3.0.

Also the power behind this little helper function is the 

get_option( 'home' );

This will be user input and you always don’t trust user inputs. Also this helps output a valid markup.

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