> Where Buddhism is similar, it's because "religion" as a concept had to be made legible to Westerners when they showed up so they wouldn't colonize you so hard, and they did this by putting Western philosophy in it.)

Reworded: Where Buddhism is similar, it's because Westerners showed up and were going to colonize anyone who didn't have something called a "religion", so they had to turn it into a recognizable "religion", which they did by copying a bunch of Western philosophy. So the older forms were even less similar.