You seem to be the only one exhibiting disgust here, friend.
The main reason for my comment - though there's plenty more - is that a 38yr old and 22 yr old are literally a generation, and hopefully (for the older person's sake) immense life experience and maturity levels, apart.
I'm late 30s and couldn't possibly fathom being in a fulfilling relationship with a 22 year old - unless I was only interested in her as an object to be enjoyed.
That this guy had interest in her says to me that he's woefully misguided/underdeveloped. And she/the "defenders" could surely see that as well.
This is compounded by just cold approaching her in public. If they happened to meet through some common activity and got to know each other and hit it off - which is how normal people go about such things - it would be a different story.
I feel sorry for the guy, and all those here who are defending him.