You did get the part where he's talking about using Java for work, in a secure environment, yes? You aren't seriously claiming that everyone that uses SuperMicro servers doesn't care about security because their IPMI interface is a Java webstart application, are you?
I mean, for my own part, I have two choices when doing hardware tests of our appliance builds: I can drive across the Twin Cities from my home office and stand at the R&D rack in a cold and noisy staging area for several kickstart/chef bootstrap/chef converge cycles. Conversely I, as a professional, can assume the risk of using a Java IPMI interface to access a server I physically took from a box and placed in the rack of a secured staging room over a secured subnet accessed over a secured VPN connection on my development VM (with a weekly maintenance snapshot, taken every Monday morning, which I don't hesitate reverting to 'cause SystemD, but that's another story), using HTTPS with the SSL cert from that box I physically placed in the rack.
If you are somehow cracking past all those barriers into the imaging subnet of our R&D department's subnet, you've already got half a dozen usernames and passwords and have changed a cert that lives on a box whose OS has an average lifespan on the order of an hour (that is, owning that box isn't incredibly useful in and of itself). Even at that point, the new SSL cert is going to tip me off. But if somehow you managed to get past all that, with all that knowledge just to infect my desktop VM, it seems to me that you already have the keys to the kingdom, so to speak.
That is all to say, just because someone has, or even chooses, to use Java doesn't mean they don't care about security. I'm sure I don't need to explain to you of all people (I read your username and it immediately rang a bell; a quick Google search confirmed my suspicion - I run a lot of code you wrote, and most likely vice versa but to a much lesser degree)that security is about defense in layers, attack surface, vectors and risk/reward. I'm sure there are plenty of other people that use Java in their professional lives that understand and accept the risk of how and where they use it.