More can always be said on the matter, as no answer is ever 'final'; further answers are more than welcome from anyone able to contribute.

For the meantime, OP, you may be interested in the following previous answers on the matter of That Greek Mountain:

• u/Daeres has an old but still good answer on Olympus;
• u/toldinstone expands further on the mountain's significance;
• and u/UndercoverClassicist addresses more generally the matter of Greek belief as a whole.