I think the sentiment is nice but historic greviences still strong. Utlimately the problem isn't more or less reliance on US security hedging but force balance being so lopsidded in PRC that US don't matter. Reminder TW use to have the largest airforce in East Asia. At somepoint (that we're probably well past), US not capable of east asia security gurantee. And whatever you think about recent PRC/JP tussle, and ignore takaichi picking fights with RU over sakahlin and SKR over dokodo within last few weeks, JP having maritime/territorial disputes with all her neighbours despite beign loser of WW2, where her borders should be prescribed by treaty, is going to lead to messy situations.