Come on, China did not have to do everything itself. It got Russian assistance quite early on.
Russian assistance in developing and making the Hans? You got to be kidding. They were at opposing sides at that time.
Building Mings and Romeos are something that a WWII level of ship industry can do, since they're based on the German Type XXI.
I'm sure if it were that easy Taiwan would have been able to do that. All the relevant European countries have refused time and time again to supply Taiwan with submarines or the means to make them. If they really mean that then they're not going to be fooled by claims of dual-use.
It only comes down to it, more excuses, more whine, no action. Believe me, the Taiwan ship industry is far more advanced than the Chinese ship industry at the time it first started to make its first Romeo or even the first Han.
Is it that easy? Does making computer chips for PCs enable you to make modern sonar? I'm not sure about that.
Yes. Sonar principles are no "harder" than anything dealing with the manufacture of acoustics, making sound, detecting sound, and so on, as well as telecommunications, digital optoelectronics and radar (EMF applications).
You do have to pay for freedom, but it's worthless if democracy suffers as a result.
Irrelevant. Building submarines locally isn't going to take your democracy away.
What hurts your democracy more if your leaders have criminal connections and yet allowed to get away with it.
A country can't just make whatever it needs. Taiwan couldn't produce something like the P-3C Orion by itself - even China doesn't have something like that after God knows how long of trying.
Actually China has already something like that. You can if you have the will power.
It has spent a very long time trying to develop anti-missile systems like the Sky Bow family - nothing more it could have done there. As for submarines, again I would suggest it isn't that easy otherwise Taiwan would have done it whilst the KMT were still in charge.
Nothing is easy. If you want to develop, you have to pay and suffer for it. Not make excuses for it, not always looking for the easy way out. You also don't seem to understand another important point---these actions are also symbolic of the nation's character, determination and will power. Nothing can be more of a telling message to the mainland.
If by sheer will power alone, China would already have won.
I very much disagree. Just because Taiwanese don't want to prioritise defence spending above everything else doesn't mean they don't care about their futures. If you look at opinion polls in Taiwan you won't see much support for surrendering to China.
The polls show they want the status quo most of all. Which is actually pretty okay for China at the moment too.