I think the simple explanation here, per POSIWID, is that people who do the latter things do not in fact want to sell you on a language. It reminds me of the people who liked a band until it got popular. The point isn't the thing itself, it's having a reason to feel superior to other people.
do:
- Explain what particular use cases the language is optimized for
- Show its advantages compared to the alternatives
- Tell me honestly what tasks it is not suited for
do not:
- Use blantant strawmen to make the alternatives look worse.
- Tell me I am an idiot