The real problem with meaningless work is it tends to be incredibly stressful. Because the underlying work creates no value, even locally (existentially of course it's all nil, but again, this isn't about that level of abstraction). The trouble with "no value" is that you also have no way know how to or even if you are doing your job "well".
Your description sounds pleasant, but my real experience with meaningless work is that it results in long hours worked, very aggressive office politics, and consistent insecurity around the future of your job and income.
The essence of "meaningless work" is captured very well in Kafka's The Trial. While their are brief moments where one can laugh at the absurdity of the situation, most of the time it sits in exact confrontation to the idyllic view of work you are proposing.