I respect your opinion but calling my research cursory is a bit unfair. How many cornfields and wheat fields have you seen? And, the fact is, contrary to other opinion, Taiwan DOES import about 10% of their rice and the amount grows annually. My opinion stands and, as I'm sure, does yours.
As HH points out, Taiwan imports rice (mostly from the US) because they can't compete with the heavily-subsidized US product. Taiwan doesn't need it, and it's markedly inferior, but they're basically doing it to keep the peace. Ten years ago you didn't see foreign rice on supermarket shelves - maybe one brand of Thai rice if you were lucky.
As for wheat - it isn't grown here because it's not suited to the climate, and very inefficient in terms of land use (~3 tonnes/ha). Maize is pretty adaptable and common in Taiwan, but it's basically a temperate-zone crop. Besides, American wheat is subsidized to about US$180/tonne (I believe maize subsidies have been cut recently). It makes no sense at all to attempt to grow such things in Taiwan. Just out of curiosity, I did actually plant a few square meters of wheat last month as ground cover. It's doing fine so far, but I fully expect to just mow it down. If it does ripen without rotting in the rain or dying in the April heat, I'll post an update
the actuality is that Taiwan is not now agriculturally self sufficient and can not be
Personally I think the big-farmhouse thing should be positively encouraged - with the proviso that the law should be enforced regarding minimum cultivation area. If we assume 2/3 of Taiwan's land area is unsuitable for human settlement (which it is) there would still be enough for every single family to own 1000m2, which is enough to comfortably feed three people and sustainably dispose of their wastes. Forested areas could probably also be carefully managed to deliver a food yield. I'm not suggesting we should all be self-sufficient (it's horribly inefficient) but if there were a market in place to make small-scale farming productive, as in Cuba for example, there are plenty of people who seem to aspire to that kind of life.
The increase in technology exports will give Taiwan the leverage they need to avoid most shortcomings caused by price spikes
What technology exports? Most of Taiwan's consumer gadgets are still just copies of foreign brands, and the technology sector in general is falling further and further behind other countries. The good stuff comes from the US, Japan, Korea, Germany, and (surprisingly) Israel. All made in China, of course. Even China is coming up with some good designs in esoteric markets (telecommunications, for example).