The fee is quite used to the development of the bitcoin economy, but I think that a possible transaction is free of charge, but also miners receive a part of money. I mean, as long as the transactions are used, the fee will go along.
I think as long as there are transactions there must be costs to be paid, including the use of bitcoin. But it doesn't matter as long as the cost is cheap and doesn't burden the user, because one of the purposes of using bitcoin is to cut unnecessary costs for transaction efficiency.
In the future maybe the use of bitcoin does not have to have a fee, but now it cannot yet because the system has not been accepted by all parties.