It's all about the prestige of winning a major for players of his calibre and wealth. The money will mean very little to him in real terms,the anger and disappointment at those 2 putts will torment him for some time...
I know. I had this argument years ago when one player was the highest earner after consistently finishing second or high up but had never won a major I said he would swap lower earnings for one major. He told me I was talking rubbish. I said I bet he would and one major would bring in a fortune in endorsements anyway.