Then design a better system and sell it to Doppelmayr.An outdoor cue, seating area and even boat are not the same as a Gondola.
Only the boat comes a bit close, as it is a partially enclosed transportation device.
Some of the feeling of being hot and uncomfortable is psychological and can be exasperated by confinement.
One can easily move from the outdoor seating, or bail out of a cue line if things got unbearable.
Try that on a gondola with screaming kids next to you, possibly repeatedly banging into, stroller hitting your legs, coupled with the possibility of guests of extraordinary square footage - or those of less than shower fresh fragrance crushing up against you.
Now add an unscheduled stop in the gondola travel due to whatever reason...