MD5 even still has pre-image resistance. A practical preimage attack would indicate something even more serious was overlooked with a design of a hash function. A practical attack would mean you could reverse the value of what produced the hash, by just using the hash.

Only seriously lousy cryptographic hash functions would have bad preimage resistance. Heck even the pigeon hole principal makes this aspect of design easier for a hash function. If a wildy used hash function some how had a practical pre image attack i would be more concerned about our process of standardizing algorithms.