I have seen some discussion online regarding making PCB directly with CO2 laser by eliminating unwanted copper with laser and leaving copper traces.

Is this a possible scenario? I heard so many different opinions that I am truly confused and want to hear from experienced members here.

Besides CO2 laser (just ordered),
my lab does have a Xenon-Phosphorus-Neon gas laser that cuts thin copper like butter....I think this would work for making PCB directly, but I don't have experience with CO2 laser.

Any help appreciated.