There isn't a logical answer to your query. I guess this is why I did not offer one.
Many of us just like to know, periodically, that our computers only contain material which we placed there. Much the same as how often we get our cars washed!
In order to make an image, two days ago, in preparation for the cumulative update (I have yet to have even a slight failure with these) I cleaned manually and with the other two mentioned. Today, I see I have just over 1kb of various temps. Not a lot to worry about. I have no idea how much would be accumulated if I did not clean.
If the figure is reasonably static, then I would agree with your sentiments.
We are tending to focus on temps. Of course, as you well know, the cleaning facilities clean quite a bit more than that. I, for example, manully clean my event logs, to make it easier to read them, should I encounter a fault. (Ccleaner also does this) Ditto cookies, which keep pestering with irritating ads whilst you browse.
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