Timeseries databases have an entirely different set of technical challenges from relational databases. Also, I wouldn’t exactly call this proliferation. There are relatively few decent timeseries databases in existence, some of which have been around since 1999.
So yes, timeseries databases are incredibly helpful if you have to store, well, large amounts of timeseries data quickly.
We also used leaded gas a few decades ago. What’s your point? Just because people go to church less doesn’t mean that’s why people are lonely, it just means that people are lonely and they’ve also stopped going to church as much. There’s no causal link there.
Plus, it’s 100% possible to have community without church.