In general I'd recommend the opposite: don't minify anything unless necessary, prettify it instead. Every plaintext-based format file should be optimized for human readability unless you actually need to make it hard to read (e.g. you are developing a proprietary product not meant to be open-source) or your bandwidth is limited so severely that every single byte matters.
Nevertheless the kind of minification demonstrated in the example (removing Inkscape bloat) feels really great and actually makes the file more human-readable. This reminds me of HTML files generated by MS Word and other WYSIWG editors which included tons of bloat code that actually harmed rendering (needless to say human readability).
I completely disagree. It's trivial enough to run any minified file through a prettifier.
Even in the first world, on a spotty mobile connection every single byte matters, and some of your users are almost always going to be in that situation some of the time.
Think of minifying as "compiling" for the web. A good dev makes their site performant, and doesn't care about generating readable source code for end-users which 99.9% of them don't care about.
If you want to expose the site's source code to the world in a readable format, then just publish it on GitHub as well, which is the audience that might actually care.
Readable plaintext files are for developers on your team. Not for end users of your product.
I'm not sure I agree in the usual case. This is sort of what sourcemaps are for. Provide a link in a comment in the resource source to a prettified or at least non-minified version at a separate URL. The typical user won't need to download the extra bytes, but you can still access the original if you want.
Nevertheless the kind of minification demonstrated in the example (removing Inkscape bloat) feels really great and actually makes the file more human-readable. This reminds me of HTML files generated by MS Word and other WYSIWG editors which included tons of bloat code that actually harmed rendering (needless to say human readability).