so that we can focus on bigger problems, like keeping planet Earth habitable in the latter half of the 21st century and the 22nd century. Unless this is done, humanity is very unlikely to experience a 23rd century.
Oh, don't be ridiculous. Humanity will surely live to experience the 23rd century. It's really hard to completely wipe out a whole species with this many members, and which has intelligence and technological capability.
Now, of course, the 23rd century will probably look a lot like "Max Max II: The Road Warrior" or "28 Days Later" or "The Walking Dead", but I'm sure there'll be at least a few humans still running around.
Don't worry; humanity has had setbacks before, and recovered from them. The Roman Empire fell, for instance, causing Europeans to live in darkness and squalor for 1000 years before the Renaissance. So we'll probably have to wait until the 33rd century before we build a base on the Moon or Mars, but we'll get there eventually, after conquering the zombies and rediscovering antibiotics.