I could be wrong but I thought the original point was that when a popular famous person, especially one who appeals to girls or young women, gets a yorkie, in this case Miley, some people worry that there will be a backlash. That's pretty reasonable IMO. Some girls will now want one because 'yorkies are a trendy accessory'. Yorkies and chihuahuas are already suffering from this mentality. Of course Miley has every right to have one and why wouldn't she? They're awesome.
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"If you have men who will exclude any of God’s creatures from the shelter of compassion and pity, you will have men who will deal likewise with their fellow men." — St. Francis of Assisi, 1181-1226