Other Kree have appeared in the MCU (Agents of SHIELD), and while I haven't seen it in a while, I don't know that any have shown "can tank a moon-exploding (character statement or not, Rocket has shown the capacity to blow up planetoids, so he should have at least some credibility) blast, then a massive starship crash literally without taking a single scratch" levels of durability. Ronan was likely an exemplary Kree, but still is probably comparable to low- to mid-tier Asgardians, and they're definitely not that tough (after several movies of power-boosts, Thor might be, but he was well above-average even in Avengers I, and was clearly nervous about the fall from the helicarrier, even without a spaceship exploding around him). Combined with the fact that it would be consistent with the comics, there's a strong case to be made for a passive power stone boost.

(Some sort of last-minute barrier *might* have happened, but Thanos mostly did that with the space stone, and exhibited far more control over the infinity stones that anyone else, Ronan included. I'm not sure Ronan had that level of control--it's not like the weapon he put it in was even designed to harness infinity stones like Thanos' glove was)