I might feel this way to the first people to land on Mars or something. This was not a "mission" to advance human knowledge. To me, it's one step away from "hold my beer"
Each and every mission had scientific objective and research being carried out, precisely to help combine entertainment/adventure with technological and scientific progress. The same will be true on Mars. The earliest guys going over, as colonists, are going to be quite well to do - which I'm sure the news will frame in a completely fair and reasonable way.
I don't think this is fair to say. The sub hull was built by NASA's Marshall Space Flight Center as part of a program to help commercial companies develop technologies that could be used for space exploration.
Just in our solar system, we have found evidence of oceans on Saturn’s moons Titan and Enceladus; Jupiter’s moons Europa, Ganymede, and Callisto; Neptune’s moon Triton; and on Pluto.
If we want to explore these oceans we will need to understand how to build lightweight subs that can tolerate extream pressures.
This tragedy will help humanity explore the solar system. I for one salute the explorers who died they have helped push us all forward.