Earlier quoted context omitted.
> As if it's impossible to know who to hire from LinkedIn, patents, knowledge of the field, etc. That's misunderstanding the argument: it's not "They poached our employees and that isn't fair!", it's "Clearly our technology was legitimate and innovative, they had to poach our employees to duplicate it!" It's an argument toward the standing of the patent(s?), not a complaint of unfair trade practices.
> That's misunderstanding the argument: it's not "They poached our employees and that isn't fair!", it's "Clearly our technology was legitimate and innovative, they had to poach our employees to duplicate it!" This seems a pretty thin argument. Hiring some people who already successfully did it has a higher chance of success than hiring randos, even if they have to do a clean-room re-implementation. So of course you'…
You're basically agreeing to the GP's "thin" argument by saying you need people who already successfully did it to have a higher chance of succeeding.
> even if they have to do a clean-room re-implementation
You can't do a clean-room re-implementation if you're hiring people who already worked of the original implementation. Plus clean-room design only circumvents copyright claims. They don't defend against patents.