It is NOT possible for a non-Catholic to validly receive Holy Communion. Not EVER.
Hmmm. That's odd, because last time I checked, Eastern Orthodox Christians have ALWAYS been welcomed to receive communion at ANY Catholic Church. In fact, THEY'RE the ones who refuse to partake in it, since THEIR church teaches that Orthodox cannot receive communion at a non-Orthodox Church. The reverse is not true. Catholicism teaches that as long another Christian denomination believes they are truly receiving Christ, they may have communion at a Catholic Church. If they believe Holy Communion is "merely a symbol" and deny the Real Presence of Christ, they cannot.
I don't know where you're getting your "facts" from.
Your statement is objectively incorrect. See Code of Canon Law 844 §4: "If the danger of death is present or if, in the judgment of the diocesan bishop or conference of bishops, some other grave necessity urges it, Catholic ministers administer these same sacraments licitly also to other Christians not having full communion with the Catholic Church, who cannot approach a minister of their own community and who seek such on their own accord, provided that they manifest Catholic faith in respect to these sacraments and are properly disposed."
In point of fact, we were in that position. We were Ultramontane Episcopalians when that denomination ran off the rails at GC 2003. After determining that the Catholic Church was to be our destination, we requested an exception under that section on the ground of grave necessity and the unavailability of a sane Episcopalian minister. It was granted. We were shortly thereafter received into the Church, since the only points of doctrine on which we differed were the validity of Anglican orders and the supremacy of the Pope. The first had disproved itself; with respect to the second, we agreed that Adult Leadership was clearly needed.