Not sure why that seems weird to you. The fun and challenge of murder mysteries is solving the puzzle with as few hints as possible. Murder mystery games aren’t trying to emulate real life. For that, you’d want a police or legal procedural, such as Sierra’s Police Quest.

I think the game tries push the player to be as efficient as possible with the information extracted from each clue. While this is true that more evidence is better in real life, it is also the case that finding and analyzing each of these takes time and effort, that need to be used efficiently.

It's partially inspired by murdle, but I think it is different enough. Murdle is all about logic clue (with some small mini games like find a finger print and such). Mystery-o-matic is about temporal and spatial reasoning, with their own constrains and quirks. It's also open-source (https://github.com/mystery-o-matic/mystery-o-matic.github.io).