Why? You'd have the gov't spend money to overbuild or be able to scale a website for the one time every few years it gets overloaded? Seems like a waste of money to me. It does just fine 99.9999999% of the time.
The other issue was that all the news articles said things like, "X Million Hondas Recalled!" As a Honda Accord owner, I clicked on the article and looked, only to discover it was for rather old Accords (nothing newer than like 2003; ours is a 2012). Others probably went to safercar.gov instead, only to find it didn't apply. (That headline should have been in the favorite clickbait poll. "X Million Cars from 1998-2003 recalled!" would have been better, but...fewer clicks!)