Larger wheels equates to better handling. Less tire sidewall, less tire flex
First, we're talking family 3-row crossovers, not sports cars or even sport sedans.
Any incremental benefit with regard to handling by sizing up can more than be made up with proper tire width.
In particular for CUVs/SUVs, the large wheel sizes have more to do with aesthetics than any handling benefit and for the target market, ride quality matters more.

