Typically the Healing Touch glyph is not worth it. Even with sagemender you just don't cast HT enough to get much bang out of it.
That being said - the regrowth gylph isn't amazing, it's just the best default choice for that 3rd slot...and it can easily be swapped out for another glyph, like the 30 yard speed roar, the 100% brez glyph or some other glyph that may be better in a specific situation. (Personally i use the roar glyph on a lot of fights)
Ask the druid his/her reasoning. I wouldn't decline the app for that one reason alone.