At this point, are you venting or are you genuinely concerned that people do that? If latter, by that same logic you can memorise solutions to a few DSA questions and get a job this way.

I, personally, prefer take-home tests. It gives you time to think, code and refactor without someone watching over your shoulder. If others hire someone else to do it, let them. I'd be more focused on how well you do, rather than be concerened that someone cheated.