The discrimination is disqualifying someone from jobs just because they are older. Maybe they understand that they're retraining in a new industry or tech stack

The discrimination is disqualifying someone from jobs just because they are older. Maybe they understand that they're retraining in a new industry or tech stack and will have to take a salary decrease, at least initially. In that case, they're not given a (fair!) interview because people assume they'll want too much money.