This is what's been frustrating for me with world health organizations.
I get the need to make sure medicine is safe and effective, and we absolutely should follow those to a T when it comes to new medicines on the market in non-emergency situations.
However, that's not the case here. vaccines are well studied in general and J&J is one of the more "normally developed" vaccines on the market. After generally ensuring that it's safe (Phase I/II tests), there should have been a damn good reason to pull it even temporarily. The "we are seeing a small increase in blood clots" really doesn't seem like a valid reason to pull a vaccine.
Personally, I lay the blame primarily on anti-vaxxers. They've made us far too cautious around vaccinations. It has screwed up our risk management rules. I've no doubt that this pull back will result in anti-vaxxers publishing BS about the safety of J&J vaccinations to try and scare people away from it.