For a competition to be interesting, it is usually required to competitive. No one but the die-hard fans of the winner likes a walkover. One of the persistent problems with Gold Cup as a competition is that the standard of play in CONCACAF is a little lop-sided, and there are a few too many games played without much suspense with regard to the outcome.
Since 1991, when CONCACAF decided to reinvent its regional championship as "Gold Cup", the tournament has been won by either Mexico or the USA - except for that one time (2000) when Canada snatched the title.