1. We saw Hela acknowledging the power of Infinity Gauntlet - there was a sample in Asgard.
2. She wasn't impressed by the tessaract neither.
3. She stopped Mjolnir, which was forged by the same dwarf on the same star.
4. this dwarf forged the Stormbreaker axe that overpowered the completed Infinity gauntlet
So... was Hela right neglecting the infinity power, believing/knowing that Eternal flame was just better?