I don't think the author is trying to say "don't try anything new unless you have evidence", but "don't use something without understanding why". Experimenting with a practice to understand it better is a perfectly valid reason. Adopting a practice and expecting it to magically solve your productivity problems, without understanding why and whether the tradeoffs are appropriate, is not a valid reason...that's cargo culting.
Another way to look at it is...what are your expectations? If you are using something with the expectation that it'll magically solve your problems, and you don't really know why...you're cargo culting. If you're using something and suspecting that it'll solve your problems, and you expect to watch it and gather feedback and evidence on whether it's actually helping or not, and potentially axe it in the future if it's not working out...that's not cargo culting at all, but effective process.
Another way to look at it is...what are your expectations? If you are using something with the expectation that it'll magically solve your problems, and you don't really know why...you're cargo culting. If you're using something and suspecting that it'll solve your problems, and you expect to watch it and gather feedback and evidence on whether it's actually helping or not, and potentially axe it in the future if it's not working out...that's not cargo culting at all, but effective process.