That page acknowledges the issue, which is all I was curious about:
"Getting back to the online search, being conscious of not wanting to send the wrong message to people, immediately before the search box I put a very clear, very bold message: "Do not send any password you actively use to a third-party service - even this one!""
Yes, the whole dataset is available. The first paragraph mentions the release of the v2 dataset and you can read the full blog post here: https://www.troyhunt.com/ive-just-launched-pwned-passwords-v...
You can get the 8.8gb file directly here: https://haveibeenpwned.com/Passwords