Yes, the fact that they are being this cautious is a good thing for public trust. We have other vaccines as well. I rather have this level of transparency then blindly tell people to get JJ and we will figure out edge cases later.
It's even worse than that. Many other countries are now following suite and also pausing roll-outs. I'm here in the 3rd world (South Africa) and we really need to get our vaccinations going, so now the government has "paused" their non-existent vaccine program with winter on the way (and after pretty hectic easter celebrations).