I've read this CNN-hosted analysis/criticism of the nature of the IDF's offensive
“In two months, we’ve had about the level of strikes in this tiny little area in Gaza as what we saw in Mosul and Raqqa combined,” said Larry Lewis, research director at the Center for Naval Analyses (CNA) and formerly the US State Department’s senior adviser on civilian harm, referring to US-led coalition operations against two ISIS strongholds. “It is an incredible amount of strikes, period-wise.”
But I don't quite get that point. Why does it matter if it took 9 months not 2 to get to the same level of destruction in (say) Mosul?