Um, I use Healing touch a lot for tank healing. I have that talent where it reduces the CD on Nature's Swiftness sometimes when you cast HT, so if I'm tank healing - once I have LB and Rej rolling and swiftmend is on CD, I actually use HT exclusively unless I get a Clearcasting proc, in which case I use Reg. Despite being close in cost, Reg is still almost 1000 mana more than HT, so if I'm just standing there and the tank isn't about to die in the next 3 seconds (most of the time), I use HT. And, because I use it, every min or so I get an instant and more heal-y HT, which is very useful to keep in bank for high movement situations.

And don't forget, you should always use a HT or RG when you get a yummy free cast proc. Not using the proc is wasted mana, sinced it's a spell you could have gotten free but didn't.

Yep i use it for regrowth, there fast and cost more mana making it more efficient to use clearcasts on.
There also easier to fit into a nourish rotation then HT, cause HT takes double the time to cast.
Im not saying i never use it but its a very low number of casts per fight compared to other spells. Maybe 3-5 casts for HT in any given fight on average.

In my experience (Might be different then you) HT isn't really needed when you have regrowth, swiftmend and nourish except maybe to spot heal which normally gets a rejuv or picked up from Wild Growth/efflorescence that gets spammed on CD.
Im not saying some don't use it hell some used it in wrath, but is it really needed to get the job done or just a playstyle choice?