It probably would be. My girl does the same thing and she is perfectly healthy. She also is in a 24" high tank and I have never seen her fall off of her branch. She seems to love just laying on it. They might not be arboreal, but they're not that clumsy!
I personally think that as long as other requirements are met (2 hides, proper heat and humidity, etc), having something for them to climb on is perfectly fine. I wouldn't go much higher than 24", but if you've noticed that she seems to like to climb, I would go with the 24" height if you have the money and the space![]()