No, the lasers are actually an optional feature... The more physically skilled members have the choice to activate them to add an extra degree of challenge to the course, in case the base experience is too easy for them.

[Which, granted, is a very small portion of the carnival population, but.]

As for the holo-screens... Trust me, that was one of the first things I proposed to the Ringmaster when I got this job. She said something about it not matching the 'aesthetic' of the carnival, I dunno...