I know a lot of senior developers who were hired this way. I don't understand why that would make anyone feel ashamed.
If I can choose to work somewhere that wants my skillset and not just someone who can code and lead other coders I will almost certainly enjoy, be more interested in, and grow more from the former. Then again, in absolute terms, starting from zero in something might be more of a learning opportunity in a way.
I thought HN hated convoluted hiring processes for the sake of making them convoluted?
Knowing the hiring practices of some consultancy firms and how they routinely upsell their hotdog junior devs as prime rib senior developers, I have to say that I also know a few senior developers who were hired this way.