It's amazing how much money is spent doing things in CG which could be done in a much simpler way.
The simpler way is much more expensive.
That's really what it comes down to.
Abrams favors using practical sets and practical effects wherever and whenever possible
, but he's also known for spending his time and available budget as efficiently as he can; if CGI is more cost-effective for a particular scene, then CGI is what will be used. While there certainly is a systemic problem in the industry with ruinous demands being made upon effects companies, I don't think Bad Robot are on anyone's list of abusers; Abrams runs tightly-scheduled productions which come in on time and under budget, and the contractors get paid for work performed.