Cringe away then.
You know, you could set up a separate user account and run programs like skype under a different uid, mitigating the access to data. Private keys ought to be stored under password and that sort of thing. The point is, you can, and it's not all that difficult to use such capabilities if you care to.
If you don't care to, then that's exactly the risk you run with any and all program that "does things" with the network. Cost of doing business and all that. You're not going to change overnight that software will have holes in it, and sometimes blatant sloppy ones to boot.
Yes, this should change --that I've been advocating too, just not in this thread-- and we've known or could have known literally for decades: EWD remarked on it, for example.
In the meantime there's the occasional hole to be dealt with, and doing that properly isn't that easy; many, many get it horribly wrong. Down to actually suing the guy reporting vulnerabilities or neglecting to fix blatant security vulnerabilities for over a decade.
I'm fairly sure this particular bug will not have been used against me because I don't use skype and don't have it installed. How others would've known, I don't know, but I did mention that I'd quibble with skype's decision not to want to scare the users for technical reasons, and that's this, pretty much. But as a business decision, it's defensible simply because of how marketing works. "Come eat cold, dead fish!" and all that.
But I say again: They've acted on earlier reports and did create a patch even though they (even if hindsight says mistakenly) believed it wasn't too big a deal, and they've promptly acted on this report and promised a patch quick-like. Of what I've seen they did was by and large constructive. It doesn't really do to slag them for that. If you believe you know better, do tell.
Oh, and FWIW I don't count myself a fanboi; main box is FreeBSD, and my trade is system administration and software engineering both. Incidentally I have seen both sides of having to fix security scares like this. You apparently have not.