Your interpretation seems incredibly warped and cynical; it doesn't resonate at all with the context of the film. In fact, if the scene was really about what you say it is, why would it even be in the film?
Why would he be baffled? It's not confusing. He doesn't look at the thing that caused the danger either. His eyes are fixed on the man who saved him as he walks away. The very idea that Clark is doing this job when he could be doing other things suggests he is interested in being with humans, in this case salt of the earth types, that is reminiscent of Jesus with the fisherman in the gospels, which isn't surprising given the writer's and director's penchant for that kind of parallel and how much they are incorporated throughout the film.
Furthermore, when the next scene juxtaposes the one rescue and his faux vulnerability with his own rescue of others on a larger scale where we see his invulnerability, I think the intent is clear. Indeed, as Clark overhears that there is a crisis on the oil rig, he also overhears that the little fishing boat is heading there to help much like the small boats on the English coast headed out to help with the evacuation of Dunkirk.
Again, there's this idea that regular human heroism is inspiring. It's lovely to see that motif replicated with Perry and Steve saving Jenny later, and Hardy, Hamilton, and Lois working on their part of the plan to defeat Zod aboard the military plane. The emphasis here is the partnership of alien and man, how we can help and inspire each other.