In my experience there is also a group of people that simply don't care about exact definitions or legal implications. They have this overly simplistic view tha

In my experience there is also a group of people that simply don't care about exact definitions or legal implications. They have this overly simplistic view that having access to the source code is all there is to it to be "open source". That's probably the group of people you refer to when you say "the community at large". I have no idea how big group is, or whether it is big at all. But I do think they are wrong. I've noticed that some (not all) of the people in this group use the term "open source" for marketing purposes. Sadly, it is a term that attracts uninformed eyeballs.