But you can't bring the same argument back to me. Cold booting requires more time and effort. Thus to make that argument, one needs to provide the benefits that compensate for the downsides. Some people provided possible benefits that matter to their specific case, like, PSU makes noise (actually, that was you in a different thread), or they want to save laptop battery, etc. But if we are taking about a modern stationary computer with mains power, there's practically no benefit to shutting it down, only downsides.
Of course it's completely valid for somebody to do it out of habit, but they can't expect to use that as a valid argument for others to do it.
I was mostly talking about stationary computers, but even in case of a laptop (unless it runs Windows which has terrible sleep management) the benefits of starting your work immediately once you open the lid outweighs the cons of losing a couple percent of battery overnight.