This "cloud" is just a normal part of the interstellar medium. There are probably millions of such insignificant structures in the Milky Way, all invisible. Meanwhile, there are many more things, which are far more significant and actually visible that still needed to be added. These things must take priority.
Yes, you're probably right, but this particular cloud is important enought to be added. I don't care the rest, it's impossible to be represented in the program.
An invisible cloud though?
Yes. Why not?