No, it's weak reporting because it's not properly sourced. It uses one person's anecdotal experience to carry the entire story. At the bare minimum to get a story published with a reputable outlet, you're typically going to need AT LEAST 2-3 strong, independently verified sources. And it's usually best if they come from different angles of the story.
So, for example, for this story you'd want to speak with several Lupus patients to get an understanding of the situation. From different areas of your readership. (If it's national, speak to people in different states. If it's local, speak to people in different counties, etc.). You're then going to want to get an industry expert into the story. In this case, probably a pharmacist. This person will be able to source how they and their peers are experiencing any potential shortages. Then, you're going to want to source the drug manufacturer (or someone familiar with the industry) to get an understanding of why the supply shortage exists. Will it be permanent? Someone in the supply chain of this product would also be a good source. Finally, you could get a FDA source into this to explain if this was something they anticipated as a result of going through with the emergency use. What are the remedies to make sure people who need it still get it?
This story really should be pretty easy. And there are likely outlets trying to do it this way. The ProPublica piece did none of it... which makes me question it. I have no real bias here. I don't know if this stuff works or not. I don't know if there's a shortage of it or not. That's the REPORTER'S JOB to inform me.
As someone with more than a decade's worth of experience in the very industry we're discussing, I find your response to me both alarming and insulting. Maybe if you weren't so aggressive in your quest to be right you could learn something from the experiences of those in the forum with you.