Why are most of your round boards are made of pine?

Why are most of your round boards are made of pine?

It’s tough for us to locally Source 15 inch round so We only use pine for our 15″ diameter round pine boards which we get already round from our wood supplier.  That saves a lot of work as with other species, you either have to find a rare 16″ wide plank to cut it out from or you have to glue and laminate pieces together and spend a lot of time sanding it smooth.