Doesn't make a lot of sense in my head. This is more of an issue of having boobs the size of missile warheads rather than being too tall.
Being a slightly tall guy myself, standing up I only have to bend forward to see the "blindspot" of a few cubic inches between my legs outside my peripheral vision. Even if I were four times my height, I estimate I would be blind to only about a 20 inch area standing naturally.
On the other hand, if I press a ruler under my ribs while standing (imagining it as the profile of breasts the size of a dragon girl's), and ignore everything under its edge as blindspot, I would be blind to my computer right in front of me at my own height.
I imagine this is a problem for her even during the day, poor girl.
Doesn't make a lot of sense in my head. This is more of an issue of having boobs the size of missile warheads rather than being too tall.
That's actually because of combination of these two issues. Also, you doesn't really needed "simulate" boobs-blind spot. Wearing a breathing mask (3M of sorts) would be enough to get you the idea. Aritst's comparison with vehicles is pretty accurate - have you been in both big truck with hood and ordinary sedan car?
I've had know girls like these. While they are were agile enough to get around most waist-high and below things if she spotted 'em beforehand, they had more a problem of... having too big inertia for sudden turns and stops. Scale up ordinary slightly obesse girl into Beth's volumes, you'll a rather squishy feeling about yourself.
Continuing with vehicle comparison, at my workplace we are using mostly hooded trucks and there's a reason for a presence of guy which job is telling everyone to stay out when the thing is arriving at or about to leave workshop.
She seems like the sort to be very self-conscious already. Add all that stuff and she'd hardly be able to move for all the embarrassment.
I believe she understands perfectly what he means when he said it's safer if he walks her home. Sort of like a common sense for her race, she conscious of it but not over-conscious to the point of feeling embarrassed.