Thoughts on adding townsfolk to a bag when they will get no value?

I played two games recently that left me feleing a bit confused and maybe a bit harddone by by the bag that was made.

In the first i am the ravenkeeper. There is a widow on the script and a player (x) announces at game start they recieved the widow ping. Still aprehensive i bluff lightly i am a powerful role with some good info and id like to live to hopefully bait a kill, spreading a "empath 0" to my neighbours.

Information starts coming out about x and some ppl me included seem to be building them as evil. Or at least not turstworthy. So i dont come out with my roll.

Evil won to an alternate win condition, but turns out there was indeed a widow. Which got me thinking it was pretty improbable i was going to get any use out of my ability. There was no mayor to bounce a kill to me, no other way to die at night and no real way for town to force the demon in a situation where they would have to pick me. so as long as the demon didnt pick me i wouldnt trigger. Which seeing the whole grim seemed likely as its just that much easier to plan kills.

Im not sure how i feel about it as the widow was able to poison a townsfolk and prevent my tigger. Basically taking away two townsfolk abilities. Which i suppose could be seen as the widows power? But isn't to fun for the ravenkeeper. To add to it i was in a sense helping evil by giving out false info. Which maybe i could have caught onto but when you learn nothing your going of mostly socials.

The second game was a pukka as the demon with 5 townsfolk including a ravenkeeper and a farmer. Again no other way to die at night so the pukka could freely kill them without them getting their abilities. Both players bluffed other roles to bait being killed but since they were never going to trigger they essentially had no ability and were spreading misinformation for no reason. In a 9 player game we essentially had 3 townsfolk abilities.

All this to say what are your thoughts on when a storyteller sets up a situation like this. Where they know from building the bag that whoever gets the role is almost gaurunteed to get no value out of it?