FME using such things the poles do get deflected if you have them mounted in such ways. I have always preferred the white wax wood sticks to the softer bamboo type but both have their qualities. There are also other types of dummies too, like the Gary Lam one you mention, so it's worthwhile to have a look around or even design your own especially if you are on your own for any length of time and unable to train with partners.
Still, I will always agree with you when it comes to using partners to train with! They are irreplaceable, and perhaps this is why these dummies exist too?