Can we talk about playing two hands? (50% of max)

[ajporrasm]

Forgive me if this has been posted before but I haven't been able to find info on two hand optimizations other than the frequently mentioned 73% of max bet is equivalent etc...


Let's assume we are allowed to flat bet on two hands playing heads up:

With 1 hand on a 1-12u spread I get:

~$61/hr with ~18% ROR and ~19.3k N0







With 2 hands on the same game with 1-6u spread I get:
~$73/hr ~17% ROR and ~15.5k N0






Not only does this look better in most the numbers we care about but it would also generate less heat since my spread is much lower.
I'm sure there is more to be considered if you only played two hands some of the time but that's not something I'm able to do with CVCX or I'd also experiment

Is this an incorrect assumption? If not then why don't we generally play two hands all the time?