So you're saying that any OS that is vulnerable to viruses is defective?
Seem you would have to add MacOS X (macOS) and all the various flavors of Linux to the mix as well as iOS and Android.
If they are susceptible to virii, yes.
Which shows that you haven't really thought through your statement, have you?
No - it shows that you have low expectations, or don't actually know what a virus is.
Expecting perfection from incredibly non-trivial (but nonetheless useful) systems is completely pointless. How would one even know that a product is vulnerable in the first place unless millions of units are in the wild and eventually attacked by the bad guys?
Strawman. I never said "perfection".
Also, note that whilst I have negative rants on malware and exploits, that's not the subject we're discussing.
And with that attitude to software, please don't get a job writing software for flight navigation, traffic lights, power stations, cars, space craft, missile defence systems etc. etc. etc.
It sounds like *you* haven't thought this through - a symptom of the Microsoft generation.
Of course, you can wait for the perfect system and opt out of the current rash of "defective" software...
Thanks for your concern, but I'm there already.