I've never had anyone tell me I looked helpless because of my height. I don't know, perhaps my scowling face and general non-social attitude scares them. Hahah. Also, I'm not tiny-boned/thin. People often assumed I was a gymnast or something.
Anyway....the most I get is just reaction to height difference. Like, this one 6' 3" guy I knew, he liked to walk up and stand right in front of me, look straight down, and say "Dang you're short." Or all the other short jokes, like pretending to use me for a sidetable/drink stand, etc. Short jokes, seen/heard 'em all.

Doesn't bother me. At least I never have to duck!
I find stores are starting to make their default shelves higher and higher as time goes by, however. I have a very difficult time reaching the top shelf at grocery stores here now, even when using the bottom shelf as a step. I can reach the first on-the-edge item up there, but if that one is gone, forget it. And if it's bulky/heavy, the balance required to knock it off a high perch while precariously balanced + catch it gracefully can be awkward. And I can't reach lightbulbs if they're very close to the ceiling, even with a 2-3 stepstool. I'd need a full ladder. It's rare that I've truly needed help from someone tho. Usually I know in advance I'll need help and drag someone along with me. I do think grocery stores should have stepstools around tho, like libraries.