They did not use traditional because they wanted to, they had to.
Just to clarify though, I consider myself to shoot traditional, not primitive. There is a big difference. What the Indians were using compared what I call traditional is immense.
And you are right, they didn't have a choice. They used what was available. They also did very well and with a lot of hard work.
I am saying is sitting bull had a choice to use a stick and string, or a Bowtech what would he use?
He would use what was easier, like you or I would if hunting was the means we fed our families.
Speaking for myself only, I would agree. Luckily I am not in that position, which is probablyONE of the reasons I shoot traditional.