Guys, is the taboo against left-handedness not outdated?

See this extract below:

Using the left hand: Using the left hand to do anything is forbidden in Igboland and strictly prohibited – regardless of the fact that the individual may be left-handed. A left-handed individual is trained or oriented to learn the use of the right hand in eating, writing, giving and accepting things. Elders deeply frown on giving or taking things with the left hand because it is considered most disrespectful and unfortunate.

Extract source:

Now, isn’t this discriminatory against left-handed individuals? Think am na?

By OzoIgboNdu1 of Igbo Defender

I am Igbo prince. Onye Igbo ka m bu!