So should we all browse through a Tor relay when we're looking at cat pictures? Maybe a new protocol can be invented that allows websites to force us to use one? I tend to dislike these dogmatic rules - you have to be aware of the particulars of your situation and design a solution that fits that. For a lot of sites HTTPS seems to me like overkill. If the environment changes where ISPs are routinely injecting ads etc. into your content streams maybe always-HTTPS will make sense, but the cases of that at this point in time seem relatively rare, not worth wrapping the entire internet in an unneeded software layer.