Unfortunately, HR is in charge of 'professional development'. Noone wants to fight HR and would rather keep their cushy job, get paid and let this thing crater.
Unfortunately, that is when, as a team, you have to not classify things certain ways. Still meet your commitments, but bake in learning time. It just becomes part of what you do during the sprint. Likewise, you should not have a "testing time", "quality", or "security" budget - you just bake those into how the team operates.