i don't understand the problem with this.
it may not be a problem for some people, but it affects moderators/administrators of games, the clan world, and traders significantly
moderators/administrators - cannot join servers where there is a rule breaker/cheater/exploiter because the server list is not there, unless they have a friend in that server already, and depending on the amount of players that go to that game, it wouldn't be very efficient to use friends to join considering the maximum amount of friends is 200
the clan world - it's harder to join an open server now, due to that roblox puts you in games that your friends are on and if, say, there's 2 servers to defend at a base, roblox will probably be attempting to put you in a full server because your friend is there
traders - some traders like to skim through server lists to trade with people rather than just find them in-game face-to-face, and depending on the place it'd take longer to find them through the search bar, though depends on how you look at it, you might not have a problem with it
as for others, some people like to join servers that are more empty or servers that have a sizable amount of players rather than let the play button do their work for them