One’s physical ability is not all that defines them. There is more to this people beyond the limitation you set aside for them. Don’t condemn someone’s mental or physical ability when they accomplish so little in life. Don’t compare your life to theirs, and don’t judge them, because you have no idea what their journey is all about.
Don’t underestimate people by comparing them to others; it’s our differences that make us unique and special. Stop judging and criticizing them or it may back fire on you someday. Instead of complaining about their weakness, look for way to help them better themselves and make a difference to the society. Remember we all have a unique war that we are fighting.