my impression is that most people who already have PhD won't have much interest to work in industry, that being said, they will stick to the academic line until retiring

if that is your passion to teach people, then need not worry about working experience in the industry, personally I think it would be a waste if you choose not to be a lecturer after you have got your PhD. For master holders they might still can go back to industry, but not PhD as that will be too old for them to compete with freshgrads in workforce