The nature of Aramaki's affinity has no bearing to the nature of what haki does to DF properties. Haki targeting their real bodies has been established multiple times in the story. You can't reject manga fundamentals just because we witnessed a new affinity power in the story that's not how you interpret things.
Aramaki building a new body on his affinity unlike other Logia's doesn't change the fundamentals of haki itself. Haki directly hits their body and the damage done by haki is
remembered
Getting hit by your weakness doesn't mean a Logia can't regenerate no different then Aramaki
So no there is no basis that Logia's can ignore haki damage. They have to dodge it as per canon.