It's not that I disagree with you...it's that a lot of people don't feel comfortable working with tools in a place they don't own, and especially not installing something safety related. Whether it's good or not to be that way, many people (probably including this mom) have never owned their own places so they're not accustomed to doing their own manual work that way. I know I'd hire someone to install safety bars, would absolutely not be comfortable doing that and I own my place. Certainly wouldn't be messing with drilling bars into walls in a rental.

As for the windows....I dunno what kind of hardcore fortresses you've been living in but every place I've ever lived has windows that, um, can be opened. Easily. By just like, putting a little upwards pressure on them. A two-year-old couldn't open it but a six-year-old should be able to.