Your translation should be tweaked a bit.  "Soyez félicitées" is more accurately "congratulations" - NOT "be happy" - "be happy" would be "Soyez heureux." 

You must take the all of what he said in context, instead of parsing out one sentence - do not forget he was thanking the housekeepers, not telling them their was nothing else they were suitable for. He goes on to ask them, as their talent and strength permitted, to become involved "in the activities that make a parish alive and resplendent: catechetical teaching, group animation prayer and apostolic movements, the diffusion of the Christian inspired press, visits to the sick and isolated people, the preparation of liturgical ceremonies, etc...."