That's interesting. This year, for the first time, I've been working with Rails. It wasn't my choice but I've really enjoyed it. A lot just makes sense and it's been so quick to get things from idea to code.
I don't think devs hesitate because Rails (or Ruby in general) isn't good, they hesitate because they hope to gain more relevant experience by working with JS frameworks.
But again, that's just my experience, it may differ for other companies and/or regions.
But again, that's just my experience, it may differ for other companies and/or regions.