No. Why would we? Just because an answer cites a specific product doesn't make it not an answer. Neither does proposing to acquire a product of a particular category.
The five posts that you cite do answer the question. They may not all be good answers, but they do answer the question.
If you disagree that the product is a good solution, that makes it a wrong answer — but an answer nonetheless. So downvote.
The meta thread you cite is about which kinds of questions are on-topic. It isn't about eliminating certain kinds of answers to off-topic questions.
It's unclear to me whether what you object to is mentioning a specific brand and model (like in four of the answers you cite) or suggesting to acquire something (for free, in one case). In any case, neither type of answer is invalid. There's been a lot of debate on meta on what is a “standard solution” and what is a “hack”, but even if you take the view that “standard solutions” are unwelcome (which would be highly detrimental to the site), this doesn't rule out answers that recommend products: a hack could well be to acquire a cheap product where a “standard solution” would be to acquire an expensive product.
We may consider an answer that just says “use this product” with no explanation to be so egregiously bad that it should be removed from the site, rather that merely relying on downvoting. We do this on software recommendations: answers that just say “use this” without explaining how the recommended product fits the requirements in the question are summarily deleted. This is not automatic: it requires a policy decided on meta, which Lifehacks doesn't have. Among these five answers, How to amplify laptop speakers? and How to vacuum room with minimal amount of effort? would be fine by SR.SE standards (they explain why the recommended product is a solution), whereas How can I boost my wifi range?, How to amplify laptop speakers? and How to steep but separate leaves in a teapot without a mesh strainer? would be borderline (none of them just says “use this” but they all devote only a short sentence to explaining the solution).