Why not? Why do you assume people with SSA are so much weaker than straight people with their own sets of problems?
We are not the poor, weak victims that people paint us to be. Sure, there are difficulties.
We do not rely on our own strength. If we did, we would be secular humanists.
All is grace. Grace to resist temptation. Grace to resist gluttony. Grace to resist jealousy. Grace to resist telling juicy gossip.
Christ and His Church, His Mystical Body, are inseparable. Adherence to moral laws, which the Church teaches, and Christ are not mutually exclusive.
Straight people struggle severely with sin and temptation, too.
If a medicine is bitter, do you not prescribe it to the patient because it tastes bad or can have side effects?