It’s widely known within ROC military that lucrative arms contract involving multiple foreign firms of various subsystems would fatten the pockets of many defence department bureaucrats. And another fat contract for the local factory to produce them.good article. the biggest issue with Taiwan sub project is that it is so expensive to build a sub, and that takes money away from systems that Taiwan really needs, just like F-16V does, I think anyone that pays attention to Taiwan is well aware of that. and since Taiwan has no prior experience in this area, the project will likely delayed, I would question if it will even achieve operability by the time a war breaks out, given the broadly accepted timeline of 2027-2030.
Therefore it could be said that the sub issue is more economic and political issue than real practical defence issue.