By the way, Einstein as a absent-minded scientist is a misconception and a product of FBI propaganda. He lived in the era of McCarthy. There were hotels with signs "Dogs and Jews not allowed". Einstein's file in FBI was over 800 pages, they were trying so hard to find an excuse to bust him. Einstein was active in politics and even believed it is his duty as a famous person to promote humanitarian ideas like racial equality. He was painted as a reclusive, harmless nerd by FBI in an attempt to reduce his influence.
http://en.wikipedia.org/wiki/Albert_Einstein%27s_political_v...
"When I was young, I found out that the big toe always ends up making a hole in the sock," he once said. "So I stopped wearing socks."
He was very bright in many ways, but wasn't perfect. For example he didn't care much for gender equality. Women could just stay in the kitchen as far as he was concerned.
I don't think your conclusion follows. An analogous proposition would be "Steve Jobs was a careless slob with no sense of style because he wore jeans to his presentations". It's possible that Einstein chose to look exactly the way he did. Or he just didn't care. Not knowing more about Einstein, I couldn't say.