It's because the disciples misunderstood the woman's reaction and intent. I am labelling this little girl as being irreverent and contemptuous, by her ascribing the power of God to a lame and inefficacious occurrence - the interpretation of a childish and fantastical dream that every little school girl has.
My point is that, if she does not know better, the members on this site should, and shame on them for promoting it as divine prophecy.
Someone is to blame, it's not naiveté behind this promotion.
The LORD preserveth the simple: I was brought low, and he helped me. (Psalm 116:6)
For ye see your calling, brethren, how that not many wise men after the flesh, not many mighty, not many noble,
are called: But God hath chosen the foolish things of the world to confound the wise; and God hath chosen the weak things of the world to confound the things which are mighty; And base things of the world, and things which are despised, hath God chosen,
yea, and things which are not, to bring to nought things that are: That no flesh should glory in his presence. (1 Corinthians 1:26-29)
God Used Fishermen and tax collectors, not philosophers and priests to spread his Word, The simple turned the world upside down. In all my years of serving the LORD, some of the greatest words have come out of the mouth of Children, and those who are "least" in society. They are more in tune with the Spirit because they are more dependent on the providence of God than the well off. I Feel this is why God uses so many woman to give the word of Prophecy to, Not because the men are incapable but because men are mired in self sufficiency, and complacency because of their status and place in society. Self sufficiency builds pride, and pride leads to complacency.
God Used a Donkey to warn Balaam, He used Jonah, a coward to warn Ninevah, He chose David, the youngest of Seven Brothers, a shepherd to be King, Jesus Himself was raised a Carpenter. This is how God speaks to those who do not have ears to hear, so that they will not have any excuse when what comes to be occurs. The Question is, are you ready and can you hear what the Spirit is saying to the church? I Am in agreement with Prayer warrior that the Spirit in me Bore witness to the veracity of this prophecy. I would not have shared it if This was not so. Its simplicity is what gives it veracity and honesty.
This, if you will, is the "deep thing" you are seeking for, but are so biased as to not be able to see it. Do some research on the Azusa street revival, The People involved were not of nobility, but of simplicity, and ones seeking after holiness. They were on the fringes of the mainline churches, not fitting in. The Revival spread not because of the strength an will of those believers but because of the Holy Spirit working in them and using them and empowering them. Like all revivals it was eventually quenched, and some of those things that occurred became institutionalized and corrupted into what it is now.