The reason to seek out more 'authentic' Chinese food is simply that you are likely to get better, and more interesting, food if you avoid the lowest common denominator...But interesting and wildly inauthentic food is great too

Absolutely.

And yes, there isn't One Homogenous Chinese Cuisine. (This reply is so short because I was just nodding to everything you said..)

Heh. I guess you could consider spaghetti Very Inauthentic Chinese Food :)