The study referred to in that link is
this one, which found that in the case of invasive breast cancer, biopsies taken by fine-needle aspiration were 1.5 times more likely to result in sentinel node metastases, compared to biopsies taken by excision.
However, what the actual clinical significance of this finding is, it is hard to say without looking at a wider context. Needle biopsies may cause tumor seeding 1.5 more than excision biopsies, but given that you will be nuking these tumors with chemotherapy shortly afterwards, it may be that those tumor seeds are quickly wiped out.
Also, since the biopsy gives doctors information about the type of cancer, and thus presumably allows them to tailor the chemotherapy more appropriately, this in itself should increase the cure rate. So any negative effects from needle biopsies need to be weighed against their positive effects.
I don't know the answers to all this, because I have little knowledge about this field, but I do think that you cannot come to any conclusions using the needle biopsy tumor seeding statistics alone. You have to look at the overall picture.
In any case, it seems that a
new technology has been developed that uses radiofrequency pulses to sterilise the needle track and denaturate tumour cells. So in future, needle biopsies may no longer present any risk of tumor seeding.