I was a fool to have refused the job为什么要加个have 呢

I was a fool to have refused the job为什么要加个have 呢
如题,中文意思是,我很傻,拒绝了那份工作.（李阳老师的句子） 我自己觉得,是不是i was a fool to refuse the job,里面的have 可以不用吧.