Fees for transfering money by bitcoins and banks
I for sure cannot answer, why other people say, that transferring money with bitcoin has less fees. Your picture is correct, everywhere are fees.

For specific cases, fees might be lower than bank transfers. I usually send money to Africa. I was doing it with banks, with WE and Moneygram, and with bitcoins. With bitcoins the advantage is, that the fees are independant of the amount. So I can send the equivalent of 1 mio Euros in bitcoin to Africa, and pay just the transaction fee. Try this with the 7 or 8% fees of the best banks or money transfer agencies. You will never ever end up at 5 Euros tx fee. So in these cases, bitcoin is far cheaper than traditional, old-style money transfers.