After all the time snail lived in my tank i can say that it is unlikely to eat adult snails or even bristleworms... I can say more - i saw the worm steal food from the snail. They do not have much braincells, which are not working very fast too, so i think chances of it catching something not stationary are minimal. But if the tank has some detritus or uneaten food it will live.) I sometimes see mine)
The only infestation i had was on the shell near head of dove snail, so i had to remove it myself
I do not expect anything from it, because i did not even want it(instead, the snail wanted me, i guess). Being alive, finding food and moving is enough for this creature, because as you said they are really stupid. But i have additional two yellow clown gobidiots, so i know how to deal with animals that don't think much... Sometimes i think that the only sane animal in my tank is a tailspot and it says something about my tank as a whole
