Sadly, there have been tragic cases with young people. However, this happened in the context of an overwhelmed healthcare system. The question is whether with proper selection filters and safeguards, we can lower the danger to acceptable levels. A vaccine seems far away.
Laughing: Why would you expect to be hit by lightning? Does every עברין get hit by lightning? It is indeed sad that יודעי ספר stray so far from the teachings of גדולי הפוסקים.
It is absolutely אסור to take up any role whatsoever in a Conservative synagogue. To my knowledge, the poskim treat it no differently than a church.