Three supposed incursions into territorial waters by unmanned aircraft (supposed, because judging by how they plotted it looks like they discretized movements and just linearly interpolated).

Flying in international airspace is neither provocative nor aggressive. Flying in sovereign airspace is. That's literally been the American position justifying their incursions into the SCS. Frankly, they're not wrong. If the area is international, they are entirely within their rights to sail through it or fly through it. Whether that area is international is up to debate, but under the claim that it is (which Taiwan has not challenged), these operations are entirely legal and entirely justified, just like American FONOPs through the strait are entirely legal and entirely justified and neither provocative nor aggressive.