Yes, I have never seen anyone taking a yoga class that has very large muscles, always lean and lengthy, typically how I hear women wanting to look and also hearing they don't want to look bulky so that would be more inline with what you are reporting but I say this knowing I have no business stating women's opinions, just what I heard.
The improvements you expext from a weight training program are going from lifting 40kg off the floor to 140kg+ off the floor. So a strength trainer will disagree that Yoga helps because of course the magnitude of gain is just not in the same ballpark as a strength training program expects. You would be better off sticking to good fundamental strength training if that was your goal.