Well, Iran is a huge mess, but in terms of strategic lessons, it actually tips the balance closer to "Taiwan, with US help and proper preparation, can deny China control of the strait of Taiwan" (and vice versa, of course). It's clear that asymmetric warfare is good now at denying access to ocean and turning it into no-man's-zone.

In a lot of ways, helping defending Taiwan (a very well-scoped objective, "do not let China land troops") would have been a lot easier than convincing a nation of 90 million to just roll over and give up rather than chucking drones across the gulf every so often.