I think Mariner was just in true form. Nonchalant and flippant. The cultural differences are huge especially the technology they’ve deployed 130 years since the NCC-1701. The way Mariner casually suggests just making more of the element like it’s getting a glass of water from the replicator and Boimler gives her a hard side-eye gives you an idea just how different their day to day lives are. Boimler was able to reconfigure the ship and navigate it on his own because the Enterprise is just so archaic by comparison to the Cerritos.