They are afraid of it because Bitcoin is better then them simply .
It's impossible to chargeback when you are using Bitcoin however you can while using Credit cards and which cause a lot of scamming . Fees as-well (0.5% to 5% for Credit cards) while Bitcoin really small fee . you don't need to provide any personal information's while using Bitcoin but you ahve to when you use Credit cards etc ... I would be afraid if I were them .