You're arguing for the tyranny of the statuo quo. It doesn't make sense for Flash to even exist, it's only around for historical reasons. If we all had browser

You're arguing for the tyranny of the statuo quo. It doesn't make sense for Flash to even exist, it's only around for historical reasons. If we all had browsers without Flash and someone came along and suggested adding it, what would your argument be? I don't see why our default should be not changing things when everyone knows the better technical answer is changing it.