The bill is a way for the U.S. to salvage some face and maybe deter China from acting. If the U.S. really wanted to join the U.S. military with that of the Taiwanese, there is no need for this act. The president and the military will just do it, maybe covertly.Regarding the Taiwan policy act, The aim of this bill is to integrate the Taiwanese military into the US military, The US already has officially few dozens of soldiers in Taiwan, unofficially probably higher and the number will probably increase as the weapons' shipment increase to integrate the ROC military with the US, so that eventually they can send to Taiwan (and help Taiwan develop) more advanced and longer range radars & missiles to help in the encirclement of China.
Their aim would not be to wage an actual war on China, but it is to militarize the Taiwan island and turn it into one massive military base to help de-fang China by having this military advantage of missiles and radars in Chinese territory, This would force China to be less bold in it's foreign policy.
The big idea of some people on the forums regarding Taiwan is that China shouldn't make use of the current weak senile leadership of the US plus the massive economic weakness that the US/EU are suffering from, and instead wait till the west recovers and have (probably) a stronger leadership (I mean you can't get weaker than Biden) and wait till the US does all the bills and military things they want to do regarding Taiwan and then wait more and more till China becomes so much larger than the west.. basically wait till China becomes god and then invade Taiwan. This way of thinking is not strategy, it is cowardice. "hey I know the enemy is now unbelievably week but still I should wait few more decades before I make a move, just to be safe".
If I were to describe this way of thinking with an analogy.. imagine if there is a guy who is scared of cockroaches, he just found a huge one in his room and it's flying all over his room, but then this roach lands on a glue trap and it sticks to it but it's still moving a little bit, there is an object right besides him that he can use to smash the roach but then the guy says "oh what if I miss the roach and it flies into my face, I should go to the other room to grab a much bigger object, just to be safe" then the guy goes out, brings the bigger object and comes back only to find that the roach escaped the trap and now the guy has to spend the entire day moving furniture looking for the roach to kill it. He unnecessarily made it harder for himself by being hesitant.
China already said they will speed up reunification, they will not wait till they are a 40$-50$ trillion economy, hopefully that means the Chinese leadership doesn't share this same mindset of "hey, let's wait for our enemies to recover and then wait several more decades".
There is no way to defend Taiwan by stationing U.S. ships or troops in there. They will be blown up just like their Taiwanese counterparts in the case of an invasion. The public outcry of losing U.S. ships and troops will force the U.S. government to respond militarily in a losing situation. No president would be so stupid. If we had any military options, we would respond more forcefully after the Chinese exercises. It is the safest way to flex your muscles and keep your credibility. We have already lost all credibility by not doing that.
It is like passing a law to deter gun violence. If someone decides to shoot, laws won't stop them.