Its just not their thing. To date they have, in a very short tiime, become the premium importer and distributor of increasing quality home use power tools.
To become a retailer would add the retailers margin into their revenues but add another business layer to manage, plus the high costs of retail and the uncertainties.
You would also see some negative re-action from their existing retailers which would probably hurt their business more than their own shops would help. No retailer will stand competition from the distributor at a retail level.
I notice that they have now got their tools into the major, general stores, ie Target and Big W.
They are also growing in overseas markets, like the US.
Things are going well for them, looking after their core business. They are probably expanding as fast as they can cope with. Why jeopardise this success for a minor, complex venture in what is an already well served market?
I would think they are sticking to their knitting and continuing to build the brand.
This is only my take on the matter. Could well be wrong.