Yes they are presently just theories as science requires proof before you can call anything a fact...

What makes me laugh is the same people who say these theories are non-sense even though they are based on our best understanding of the evidence.

Are the same people who believe a story with absolutely NO proof at all and the present it as a FACT.
Even though the story they believe in, is just one of the latest in a string of more than 1000 different stories to explain our existence, we have so far invented :-0