I wouldn't say that they don't care necessarily but I think their focus has shifted to fully developing whatever Destiny 2 ends up turning into. While it is disappointing that there won't be any new major content during TTK, I can't say that I'm surprised by it.
Do I think they are milking TTK till the last drop? Yeah... totally.
These little free events are nice, but like I've said before it's just not enough for me to come back to Destiny full time. I suppose many people will start to feel the same very soon.
After Oryx Challenge next week, what's there to look forward to? Probably a Christmas event.