Those who do not regard life with happiness, especially human life, are the saddest, most despicable of people.
That said, with technology being upgraded all the time and new inventions being made, it IS possible to block off volcanoes with walls and systems that reduce lava’s damage.... to nothing.
Then of course you still have the problem of toxic gas spreading, but there are scientific ways to stop that in its tracks.
The problem with humans (if you stop reading here, go ahead, but you’ve lost my respect in that case), is we accept everything as it is. We don’t consider possibilities to save more lives and to improve the world. We just.... let things happen, and that is the saddest and most cruel reality of all. We are our own worst enemies.
Do we deserve to die because of it? No. We deserve to die if we don’t get smarter about protecting the only world we have as home.