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This is what your competing with and it's pretty stiff competition. Flats are just not a thing with a flat-resistant tire, I don't think it's ever happened to me. Compared to a normal tire they're heavy, wooden, and expensive, but compared to solid foam they're literally like riding on air. Schwalbe knows their shit.
To answer your question, why SHOULD you go airless? Are you in some weird edge case where you're riding over big sharp things all the time and absolutely must never ever have a flat? Like, are you commuting through a radioactive scrapyard or something? If so then ya sure do it, but tell us about your special needs!