Right now there is exactly one challenging encounter in this game and 2/2 Healing Focus is considered as standard for it as a holy priest. While I'll concede that this was probably not her prime motivation for choosing this spec, I would suggest to refrain from sweepy generalisations that might lead people to ignore the value of this talent.
So, what you are saying is, you see your role in a raid as topping the meters, instead of getting the job done. Rather interesting - but to a certain degree it might actually be promising for the moment. I'm curious what is going to happen, though, once healing (and raiding in general) becomes nontrivial. The only thing that you are actually proving with this statement is that your raid is taking too many healers (and consequently that the degree of "difficulty" currently allows your raid to do just that). Try doing Satharion and 3 drakes either 10 or 25 with this approach and you will see what I mean.
Matter of fact, too many healers play the epeen game which results in them not getting the job done because they try to use every single cooldown for bringing a cast through, no matter who they are actually supposed to heal.
This actually made me smile. Inner CD of 45 secs yet it proccs all the time? Amazing.
Note: Trinkets with random haste procs are generally not nearly as good for healers as they are for damage dealers, because you have no way of ensuring that the proc comes when you need it. Of course, if your intention is to just squeeze in a heal quicker than another caster because you want to top the meters, it might just suit that purpose.