> Requests for advice and assistance are not good indicators of intellectual weakness - the expert marshalling of additional resources in resolving an issue is a good thing when utilized appropriately. An example would be an engineer toiling in silence through a difficult problem on their own even though the organization has a competent expert that can expedite the process.

Intellectual strength isn't the same as senior developer. There might be correlation but it's probably not super strong. I agree that someone not asking for help is definitely junior. But I might also argue that someone who does need to ask for help probably isn't as senior as you seem to think they are.