Even accounting for the generation of dangerous (to humans) mutations, the benefits gained from our increased understanding of bacterial lineages and genetics almost certainly outweighs the danger.
What? Why not? Rate of mutation is an evolutionary parameter just like everything else.
Compare this other sidethread comment: https://news.ycombinator.com/item?id=31775592
One of the most invasive species in the world is the argentine ant. Which evolved over many many years under a very specific set of conditions until one day they were exported by colonists and have basically taken over the world. It turns out that that intense Amazonian environment, one which is very rare to find anywhere else, just happened to be an amazing training ground to evolve certain traits that gave them the ability to take over the rest of the world
When you leave organisms in such specific conditions, there's always the chance that you're selecting for incredible fitness for a specific ability. A specific ability that might not evolve in a more diverse set of conditions because perhaps it doesn't pay off until it's sufficiently developed.
With argentine ants this might be how well adapted they are at having multiple queens and quickly reproducing to recover from any sort of damage