I can totally relate. I'm left-handed and people sometimes watch what I'm doing and it must seem odd to them. (Even I look at President Obama and despite the fact that he is "one of my own," his left-handed orientation seems always noticeable.) I think my left-handed approach is why people try to help me sometimes - that and the fact that I now have wrinkles! When you get older, people assume you can't lift your own groceries, etc. etc. That makes me grab the 10 lb. bag of potatoes, sling it over my shoulder, and walk like a sprinter out of the store, just to show I'm not decrepit.
Adults who were first-born children, I have come to realize, are the WORST! They assume everyone is their little brother or sister and they know how to do it better and faster. My husband is a first-born and he watches what I do (all well intentioned, mind you) and wait to catch in mid-air, whatever it is that he's sure will fall out of my hands or off of a counter where I left it precariously balancing (but knowing exactly what I was doing). Drives me CRAZY. As for counselors, etc. I tend to believe that everyone in the world knows better than I do. I think that's from my backwards approach to a right-handed world - (maybe), so I usually take their advice. Lately I've been able to tell people, "No, that doesn't work for me." However, don't walk into an emergency room telling them emphatically that you have a slipped disk when you don't really know what you have. They tend to believe you. (Opps).
Bottom line, it would be nice if more people let others try a task (especially older people) and assume they can handle it. I try to stick around in the background, in a store for example, if I suspect a person actually WILL need help. Then I'm there if he or she needs assistance. We have to assume more often that people WILL ASK if they need it. It's tempting for all of us to build our own self-esteem on others' needs and we really need to ANALYZE OUR MOTIVATION and discipline ourselves to resist helping for the wrong reasons.