And this is a prominent legal firm (Siam Legal) giving the same opinion.
"While holders of a Thailand Privilege membership aren’t allowed to acquire a Thai work permit or work for a company based in Thailand, they are still permitted to work remotely for international companies."
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I know they are an agent with an incentive to sell you a visa but they are also a prominent legal firm. When both legal opinion and the Thai government itself is saying you can do remote work on a visa, you probably can do remote work on the visa.
I think the Thai government simply doesn't see remote work as the sort of employment that is prohibited on any visa. I don't actually think either Elite or DTV are legally distinct in this regard, DTV was just the first visa they really started to promote widely for this. Elite had actually promoted Elite for this a bit before DTV came out, DNs were was one of the target categories in their re-launch (when they bumped the prices).