Different rocker ratios intake vs exhaust

The intake will always benefit with more lift unless the port itself doesn’t support the added lift.
The exhaust normally doesn’t care.

One of the reasons is the exhaust is now just spent gas, smoke left over from the burn and ideally no fuel. It is hot and looking for a way out. The expanded burnt gas is also being pushed out and with a properly designed exhaust system, it is also being sucked out at the same time. Between these three things and a good exit port, the burnt fuel just rushes out.

Intake is different once your moving heavy fuel and air through the system. Air cleaner, carb, intake, head port and past the valve. These items are very heavy by compare and do not like to make direction changes. I just listed the whole track of each side. Which wants to move fastest, easiest and quickest of the two?

Exhaust! It is what it is.
When you hood the valve open longer you will make more power. If the port will flow more air with a higher lift, it will make more power. And this is why the added rocker ratio is a power maker and not so much for the exhaust.