What that fox news article failed to mention is that monoclonal antibodies are passive immunity: The "immunity" only lasts as long as those antibodies do, which is maybe a month or so. This treatment does not teach your immune system how to make the antibodies, which would last years (or maybe a lifetime). So as long as the virus is still out there, you could catch it again and need another monoclonal antibody treatment. And again. And again...
Sort of the perfect product, for the company making it. But getting a vaccination would be much better protection. Until then, though, this treatment would be great for patients in the early viral replication phase, or for prophylaxis.