Because 5% of a big number is still a big number.
I guess we just see that differently. And will have to agree to disagree. I think 5% is very small relatively speaking and you don't. Not much we can do to overcome that disagreement.
And a lot bigger than 0.5%. Many a virus has been created for client systems with an installed base number 10's of thousands, but somehow a system with an installed base numbering well over 10 million is safe via "security through obscurity"?