This is somewhat true.What I have found it happens a lot in servers that have more dominant clans. Where big clans don't wana help anyone but clannies
Most dominant clans only focus on catering their own clannies and it's understandable.
You have 1 small car with no extra seats, and have to drive your daughter to school, while on the way there's a random person walking across the street looking for a lift. More than often you will drive by that random person because hopefully you consider your daughter as priority.
Generally, if you ask politely, don't spam the person, they will help you when they're free. They will most likely be busy if it's an active server with lock battle clans. Those lock battles can sometimes take toll on clannies and act as a drug.