I was more pointing to the fact/class of bugs we don't even know are bugs yet, like "re-entrant" bugs for eth.(logic bugs ?) The cost of having a bug in an eth contract is many many times higher than say a wordpress site getting hacked ! Or having a bug in your online-design tool.

I've seen many a times, "business ppl" just go with lowest cost when wanting some software done. Try going for the "lowest cost bidder" when getting a web3 contract coded !

You right, bugs do and always will exists and we are all but human, but some bugs have a much higher cost than other - even if they are simpler.