Loyal Jew: That’s a cute way to read the Issur, but it’s just not true. Chukas Hagoyim is a Machlokes Rishonim (and Poskim) whether or not it applies to things that Goyim do as a matter of course or whether it has to be based in religion. I believe we Pasken that it has to be based in religion, or at least for the sake of being ostentatious. (See Yoreh Deah 177, I believe, with the Nosei Keilim and especially the Gra in S”K 1 and 3, if I recall correctly.) As I mentioned above, maybe royal sports like tennis and polo could fall under this category. Maybe.
Darchei Ha’emori means superstitious practices that are based in Avodah Zarah (or at least Kishuf). It has nothing to do with “secular goyish ways”. See the Gemara in Shabbos 67a going over to 67b and Chullin 77b going over to 78a, if I recall correctly. Also see the Tshuvas Harashba. (I don’t remember what Siman but the numbers 1:181 and 1:187 stick out in my mind. It could be anywhere though; those Simanim are probably other things.) Your “explanation” of Darchei Ha’emori is so far off that it would be a violation of Bal Tosif according to the Rambam if a Beis Din would Pasken that way.