This.
The difference is so little between hit and haste that human error will probably make hit worth more.
Of course, if you are on a target dummy and only have to stare at your dot timers, perhaps you could react fast enough. But on a new encounter when shit hits the fan, you may very well not realize that some of your dots have missed and that's when it really counts.
At the end of the day though, as some have pointed out, the difference in dps is not going to be massive. So it's more about peace of mind knowing that you are hit capped, or whether you just don't care and would rather have more dps stats.