Yes but I guess the point of using time series DB rather than just a lake that doesn't necessarily have a time structure is that if you know time is going to be important then you probably want to organize and query it that way.

What I am doing with one program could almost be called a data lake because it is just a bunch of JSONL files that have really varied data in them. But it's organized by date and hour per day as well as predefined keys, since I know I will need to query it that way.