"My work experience in Taipei will not necessarily be helpful when I return to the US in the future." It's just that she would have regretted it if she had not taken this opportunity now, while she is still unmarried and has no children.
「台北工作的經驗對未來回到美國不見得有幫助」，只是不趁著尚未結婚、沒有孩子牽絆前來試試看，總覺得會有遺憾。