Sharing your idea to get an intuition

[beginner984]

Hello mixcr team

I read that 10x genomics cellranger returns some output from count for GEX (5' and 3') and VDJ for enriched immune receptor libraries which could be visualised by tools like Platypus, etc

So, having this, what is the purpose of tools like mixcr please? I mean, when 10x genomics cellranger gives these things why one should go to mixcr like software

Am I right mixcr and cellranger can do the same tasks?

Sorry I am very naive in immunology

Thanks for any help in advance