This exactly. Intelligence being heritable does not imply that any one particular population is more intelligent on average than another.
“intelligence” is a pretty nebulous term to begin with
This is also accurate, but I’m glossing over that because it’s late and that fact is only tangentially relevant to the question.
Why is irrelevant. Imagine if people argued over if a murderer killed someone because they felt like it or because they looked at them funny. See how pointless the question is? Do you understand how no sane person would argue about that?