Some people hate apologizing all together. They’d much rather lose friends, customers, or even a marriage than to apologize.
Then there are those who apologize compulsively, saying “I’m sorry” so much that it loses its meaning. And then there are those who fall in the middle somewhere.
It’s sometimes tempting to avoid apologizing for unintended harm; but salvaging relationships is more important than being right. Even if you weren’t wrong per se, it’s a good idea to apologize if someone feels offended.