My sister used to love thrill rides, including coasters, when we were kids. Now she cannot stand them because she gets motion sickness while I have never outgrown my love of coasters.
Everyone must understand that coasters are not for everyone. I think it is wrong to shame anyone into going on something when they are terrified as there can be serious health consequences. About 16 years ago when I was at CP, medics had to treat a woman who fainted on Magnum- despite her terror her group teased her into riding.
Please remember to be considerate of others physical and mental limitations when it comes to riding thrill rides.