Actually being able to say sorry is a strength and shows what type of person you are.
Sorry is a big thing to say and to mean it. Lots of people say sorry but aren't actually sorry. They say it to get out of trouble but don't mean it. If you are genuinely sorry you understand what has happened and where something has gone wrong and are genuinely remorseful for your mistake.
No one likes to admit to doing something wrong and it takes a strong character to admit this. by saying sorry it is admitting you are not perfect and should be forgiven for whatever mistake or mistakes you have done.
I say sorry fairly often and I genuinely mean them as i don't do things that are wrong on purpose. I will stick up my hand if I have done something wrong. We learn from our mistakes and it is not done on purpose.
These days it is rare to hear someone say they are sorry as they normally keep quiet and won't admit to whatever they have done wrong. A true person with a strong character will step forward and say SORRY.