That's not what the quote says, DM. That's your interpretation. It says not to look for extra scientific explanations for what is simply explained (by elegant math, I suppose).
I knew that wasn't Einstein. He would have said it better. Its needlessly complex for a simple idea, that quote is beautifully ironic, in fact. I was surprised you agree as it touches upon things like evoking 'spiritual' explanations for things that are rational.
Good that you appreciate it.
Second thoughts can generally be amended with judicious action; injudicious actions can seldom be recovered with second thoughts.
--Cyteen by C.J.Cherryh