I'd want to be there for the delivery people, too. I try to meet the Amazon delivery driver in the driveway whenever they bring something; it just seems polite, and then they don't need to puzzle over which door to leave the package at.
At work, we have a postman pick up the outgoing packages every day; sometimes there's four or five heavy sacks. And sometimes the postman is this petite Chinese woman who is 4'10" and weighs maybe 95 lbs. I used to help her carry the bags out to the truck but she started to get offended. "You think I not able to lift this?" So now I just leave her to it, but it still makes me uncomfortable!
I can certainly relate to tiny Asian women that don't want help. The cleaners in my building are tiny Vietnamese women who are often carrying stuff that looks too big for them but then shoo you away if you try to help. Maybe they find it patronizing because yes, they are capable of carrying stuff. I once tried to help them with a sofa in a stairwell and they were just like "no no, we got this." haha