Switching hand to right hand only was definitely forced in the Irish education system back in the 50s/60s, I have older relatives who were forced to switch hand

Switching hand to right hand only was definitely forced in the Irish education system back in the 50s/60s, I have older relatives who were forced to switch hand. There are also people who completely ambidextrous, look at the professional snooker player Ronnie O'Sullivan on YouTube. He plays against people who would have put in equal amount of time tin the 10s of thousands of hours and no other professional player can play as fluently on either hand.