If you're a tourist visiting from an area that isn't near the coast its worth doing. I recently discovered that the new the Elisabeth line intersects with a c2c train station, Stratford on the Jubilee line. That is quite useful to know. If you're close to the Elizabeth line, you could go to Stratford instead of west Ham and get the train from there.
I still prefer 'West Ham' myself because the station is quite compact and easy to get to. You can get to 'West Ham' Station by taking a Jubilee train or district train, or even Hammersmith & City Train. I think even the DLR goes there.