Much easier than the logistics of keeping a robot operational in the field. You don't care whether the Taliban captures your flesh and blood mule, but you really don't want them capturing your world's-most-advanced robotic mule.
The Taliban are not going to have the capability to reverse engineer and produce their own copy, let along having the logistic capability of keeping it in the field.
I used to have some old (tube-based) test equipment that included instructions on exploding it with a grenade in the event that it had to be left behind. The grenade was not built in, however.
Sell it to a country that has the technology level needed to copy it. Russia and China likely would be interested; they might not want to do business with the Taliban directly, but might be willing to buy them through a middle man, say Pakistan.
A lot of the ability of the Boston Robotics robots is in their software thought which is much easier to lockdown via encryption. The rest is the hydraulic mechanism which is not easy but is the best known part of what the BR robots do.
Sure and it's a problem the military has been dealing with for decades. I'm going to assume they understand the calculus and some effective countermeasures.
Perhaps reverse engineer it, find someone that can reverse engineer it, exploit it or others like it, expose every detail about it all over the internet, a number of potentially harmful things?