Why is a kapok tree tall?

this tree can grow to 150 feet or more, with a diameter of 9 feet, the wood is pinkish and many animals and birds can live in its canopy. The straight trunks can be made into dug out canoes and the fluffy seed covering can be used in making pillows and mattresses. It is widely spread around the world and wherever found is important to local wildlife. However because it is so usefull it is open to exploitation and thus may have an uncertain future