Not really sure the strange and inaccurate comment about needing another computer available online to install an open source OS really adds much to your argument here.
Java also has excellent out of the box documentation. Tools which are developed commercially often have better documentation whether the source is open or not, and where there is good documentation Stack overflow usually becomes a last resort rather than a useful reference. Either way it's something I look at for specific questions, not as some kind of community where I go to answer surveys
Again, I'm not dissing open source here. I've learnt a whole lot from it. But there's many, many things that are lacking in open source, which when seen from the other side seem extremely basic and fundamental to creating good software.