Thanks for the link. I look forward to hearing more about this.
Seeing a laser beam in the vacuum of space is an artistic choice as well. One that should raise flags first before the talk of a continuous beam vs an intermittent burst. To be more specific using lasers as weapons also is firmly in the fiction side of sci fi so I am glad sci fi doesn't take things too seriously.
LASER weaponry isn't fictional. It's been in development since the 1960s. As for visibility, that's a good generalized point about a vacuum, but even space has areas where particles, debris, etc are present which would make a LASER's continuous beam visible. An unrealistic beam portrayal is a greater issue than its stylized visibility.