Because it's so useful to me that I'm willing to accept the risk of it having access to the thing it needs for the benefit it provides. I'm not willing to accept the risk of it having access to things it doesn't need for no benefit.

Then again, I was wary of OpenClaw's unfettered access and made my own alternative (https://github.com/skorokithakis/stavrobot) with a focus on "all the access it needs, and no more".