My son had training wheels on his bike when he was little. He hated them; he wanted to cycle on his own without them and thought they slowed him down.
So we took them off and, unsurprisingly, he rode brilliantly, never crashed and was perfectly safe.
The training wheels weren’t for his benefit, they were for ours. They were for our peace of mind, not his.
Is your organisation keeping training wheels on your employees for their benefit or yours?