If you grow up in a traditional Buddhist community, there's more of a clearly defined set method for being Buddhist, and how to integrate Buddhism into one's life.
If you grow up in a non-Buddhist community, you have to find your own way to a greater degree and its unsurprising that people who have no standardised roadmap within their local community, will come up with diverse ways of applying Buddhism in their own lives. That's neither inherently good nor bad... it simply means there's not much in the way of convention to defer to.
We see these differences even in our interactions on Buddhist forums.
Western Theravada is certainly not homogenous, but neither should it be portrayed as two diametrically opposed approaches.
Through corruption of the Dhamma comes corruption of the discipline, and from corruption of the discipline comes corruption of the Dhamma. This is the first future danger as yet unarisen that will arise in the future. You should recognize it and make an effort to prevent it. (AN 5.79)
Neither traceable in the Discourses nor verifiable by the Discipline, one must conclude thus: 'Certainly, this is not the Blessed One's utterance; this has been misunderstood by that bhikkhu — or by that community, or by those elders, or by that elder.' In that way, bhikkhus, you should reject it. (DN 16)