Theoretically yes, but u/BenIrvo did state that the harder the content the greater the rewards. So likely RNG percentages for Legendary gear will be greater in said harder even if the loot table allows the chance for that gear to drop during free play.
But yes you’re right. As in all looter type games, we will always look for an efficient way to find that high tier gear with god roll inscriptions that work for our builds.
And we will be on the look out for this stuff and make changes as needed.