Like I said, spiritual Communion is fine when it’s a Catholic in an “irregular situation” or perhaps someone of a Protestant faith who is fine with the idea of coming up and bowing before the Eucharist, in other words acknowledging the Real Presence. I would further presume that the Catholic Bishops’ Conference of England and Wales may be thinking of Anglicans, whose views on Communion are not that far off from Catholic views, and about whom there is some controversy over them not being permitted Communion just like there is some controversy with Lutherans.
I have been to Mass with Protestant people and non-Catholics who, according to their faith, did not believe in the Real Presence or see the Eucharist as anything more than a symbolic sharing of some bread and wine (if that), and would not be bowing or genuflecting before the Eucharist. These people might be fine with the idea of receiving God’s blessing, but the idea of “spiritual communion” would not be on their radar screen at all, and in fact they might be put off by the thought.
Edited to add, By the way, I read the entire EWTN article you linked - Not just the selective sections of the very long article you cut out and posted as supporting your point - and noticed that there are significant parts where the writer on EWTN is questioning several aspects of this idea of the “blessing” being “spiritual communion”, one basis being that it “weakens the awareness” of what Communion actually is.