Not being able to automate something is not the same as not being able to verify at all. It sounds like the parent commenter is arguing that at least some of the clients listed are not worthy of this trust because (either intentionally or due to developer error) they don't actually hold up to scrutiny. Obviously they're just one person and their opinion might not be representative but it's hard to argue that if some random user is expected to have enough time to try out various clients and figure out which ones work or don't that the official people in charge of making the recommendations of clients should probably be able to find the time to as well even if it's just a volunteer that they, well, you know...trust.