I think there's something even more compelling here; Monica idolized Carol as her cool auntie figure and a hero she looked up to, until Carol a) was abducted and brainwashed into a Kree soldier and b) even when she turned to her senses and reunited with her and Maria, she stayed mostly off Earth, protecting the Galaxy until she needed to come back for Thanos. They even hinted this film will explore how many times Carol has really visited since the 90s. Monica was already upset that Carol wasn't there for Maria when she died, even though Carol wasn't snapped away like she was. This builds to very interesting drama between these characters.
On the other hand, Kamala is a teen girl who has no reason not to idolize Captain Marvel, whom she has never met before this film. She's an icon for helping save Earth from Thanos as far as Kamala is concerned. She's teaming up with her hero. Carol is no longer a hero for Monica, there's unaddressed trauma between them. Really interesting contrast between her and Kamala.