There will be a lot more going on than you realise. There are always new initiatives being introduced (in any line of work), skills will need updating for some things, there will be training courses with outside speakers, there will be targets, goals, statistics to be discussed and acted upon, probably performance management meetings, guidelines issued by various parties to be looked at and acted on, discussion of new medicines and procedures, etc, etc. All staff will be required to be involved with some of these things, and this can only be done during working hours.
Staff training goes on in all professions. It won’t be a gossipy jolly with coffee and cakes, but work (with coffee on the go, probably).