you are forgetting hindsight is always 20/20, that's why.
Pats were off balance after that crazy catch by Kerse and had their heavy D formation. One can question that call day long but it wasn't as ridiculous as it may seem, given the circumstances.
In the end of the day, it's about making plays when it matters the most - if you have to go all rational there, Seahawks should have never been in that situation to begin with considering the Kerse catch had nothing rational about it.
One team made one play more than the other, that's what it comes down to - I don't see anyone giving the Pats that title in 2007/2008 due to the helmet catch on 4th and long (iirc).