In your example I would point out to the new player, yes there are some low value rates, 6. But you have a better chance of pulling a legendary then pulling op one of these.
And hey if my friend wants to trade a Jetpack for Jedi Robes who am I to say no??
Scum for life!
Except there is no correlation between the favorable Legandary distribution and the problematic starter rare issue. One doesn't cause the other, so there is no reason you couldn't have both the favorable Legandary and not have a bunch of worthless rares. That would yield better expected value from booster, meaning people are more likely to feel comfortable buting them over singles, which again is good for FFG because they make money on boosters.
You're offering the favorable Legandary distribution as a salve the the problematic starter rare issue. I did that a number of posts ago, but doing so doesn't change the fact that having rares in boosters be inherently undervalued is a bad idea.