I take it you don't consider space exploration important. Despite what you think, space exploration should be something near the top of everyone's list to worry about.
Why? A multitude of reasons, firstly the perpetuation of the species. If we can live in space and/or on another planet, say Mars. In the event of a major widespread illness or natural disaster, there would be enough people living on another planet to survive. The second reason is population, with 7 billion people on the planet it is getting pretty full, we need new places to expand. Thirdly, natural resources, we can probably find lots of much needed natural resources on the other planets in the solar system.
Being able to have space stations in orbit or other places in the solar system would allow for the safe R&D of dangerous technologies, for example if research on infectious disease could be done on a space ship or space station, in the event of an accident they wouldn't risk the entire planet.
Plus space exploration has a major trickle down effect on a lot of other industries. For example long range (like to go to mars) space ships are going to need efficient long term power generation, food production and high speed communications, compact life support systems, all that technology can be applied to other areas here on earth. Not to mention all the jobs it can create since people need to design and build that stuff.
All those rockets NASA burned up during the Mercury program to get a working launch vehicle that could send an object into orbit paved the way for all the satellite systems we now enjoy.
As for the people that died in 1986, while tragic and completely avoidable, we have to realize some people are going to die pioneering this frontier. Sure NASA has been caught twice now (Challenger and Columbia) taking some safety for granted but that is a fixable problem. If you think they should have stopped in 86 because of the loss of the Challenger, they should have stopped after the Apollo 1 fire killed three astronauts. But it didn't stop them, they figured out what went wrong and made to design changes to prevent it happening again. And with Challenger while being negligent in authorizing the launch, afterwards they did redesign the O-ring system to better prevent the issue from happening.