I believe...
that what he meant was indices that have less "risk". For example, say that doubling a hand has an EV of +.17, while hitting has an EV of +.16. The "hit" is more "risk averse" as you have 1/2 the money riding on the outcome of that particular hand.
There are several hands that fit this, most of which are of the form that cause you to increase your bet (doubling, splitting). For counters, this happens on the index point for a particular BS deviation. IE suppose you run a set of sims and discover that you go from hit to double at a TC of X. At X-1 the EV for hitting is barely better than the EV for doubling. At X, the EV for doubling is slightly better, but "slightly" being the operative word. If you flip a coin with 10 bucks on the table, there is less risk than if you flip it with 20 bucks. Even if there is something odd about the coin that makes it come up heads 51 times out of 101 flips.
If that was obvious, sorry I broke in. I like the idea of risk-averse myself, as the variance can already go nuts.