I've worked in a Hospice where the local undertakers used to get involved in death cafes and support afternoon tea events for dying matters weeks.
It's easy to criticise, but some people approaching death want to discuss their funeral plans. It can be hard for families to do this, whereas undertakers are professionals who will listen, engage and offer suggestions.
I don't love the valentines idea, but care home residents are going to need their services and it's not unreasonable to advertise and build relationships.