Once again, telnet was an established protocol, yet we got rid of it. I am sure people presented passionate arguments in favor of keeping telnet forever, saying that there are other threats on the Internet.
Getting rid of HTTP will make people more secure. It will ensure that basically all sites people visit will be protected by a trusted cert.
Note that nobody is talking about installable malware here. We are talking about protecting the web. For example, if your connection to news.ycombinator.com is protected by HTTPS, this makes it that much more difficult for the NSA to spy on you, or for me to insert a goatse into the content while you are at work, and I am sitting in the next office over form you.