But what is a ‘just cause’?
Redemptionis Sacramentum certainly doesn’t encourage daily Communion outside of Mass if Mass can be celebrated on Sunday.
I’ve experienced the abuse, when I was a member of a linguistically based “Catholic Community”, of seeing my community have a Sunday Celebration of the Word with Communion when a priest who spoke French wasn’t available to celebrate Mass. This in spite of the fact that all the members spoke English as their second language and had to drive past one, two or even, in some cases, four or five English Churches where Mass was being celebrated in order to attend the Liturgy of the Word. I never bothered to go unless I was tasked to read or be EMHC but even when I had to go to the LoW, my children and I still attended Mass elsewhere.