<em>"The big question to me is, why isn't Adobe serious about making this technology better? I mean, if Flash worked superbly well we might be not having this discussion."</em>
It's much better than it was, and about to become even moreso. The major part of work over the past year has been invisible to you so far, but cross-device predictability is coming from almost every major manufacturer this year.
The Apple problems are only partly about technology.