Because it makes them money. See, monolithic companies don’t care about anything other than money and pleasing shareholders. The only way they will ever care about real life issues is if/when they transform into loss of revenue or pressure from their board of directors.

I… Don’t think that stat refers to you

I mean, as long as you patch regularly and keep backups, you should be good enough. That’s most of what responding to a zero day is, anyway, patching.