Why not just say if one isn't a commercial pilot doing a 1000hrs per year one shouldn't be doing it?
Who has suggested any such thing?
Then again, those who do fly a considerable amount, with a considerable wealth of experience, nearly uniformly have very different views from those with little or no experience. Why do you suppose that is?
What is being said is it should be 30 hrs or some other made-up amount.
Any value is a "made-up amount." The numbers don't grow on trees, you know.
An hour a month is a very miniscule amount of flying in which to engage and hope to retain any semblance of proficiency. An hour a week isn't much, either. Four hours a month, one a week, is expensive and hard to do for many people, but it's not much.