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SSL/TLS protects more than just the data in transit, it prevents the paths, directories, and query components of a URL being snooped, which some people care about.
The BOM also handles it stupidly in that they do listen for incoming requests on https://www.bom.gov.au and rather than serve the fucking weather they serve a page to tell you they don't support SSL. Guess what happens when you try to visit the BOM website in any modern browser that tries to make an SSL connection first?