The best teams with the most talent do not call themselves Showcase Teams. Oddly enough many of the lesser talented teams do label themselves as Showcase Teams. Is that a marketing thing?
If you named the top 100 summer or fall baseball teams, I'm not sure you would find any that are called showcase teams. Yet these are the teams that draw the most interest, by far, from recruiters and MLB scouts. These teams play to win and that is the very best way to showcase any individual player. These teams produce many DI commits and draft picks every year.
Also, baseball is very much a game of individualism. That pitcher and especially that hitter is in the most individual position in all sports. There is nobody blocking for him and nobody to pass the ball to. It's almost always you and the ball, whether it is pitching, catching, fielding, running the bases, or hitting.
The team part of baseball starts with simply being a good teammate and being coachable. Doing the little things and executing your job. Giving the effort it takes to help your team. Understanding the game and the situation. To be willing to do the right thing at the right time. The better you are as an individual the more likely you will help the team.
But from the time the pitcher throws the ball, to when the hitter hits the ball, to when it is hit in the direction of a fielder, and everything after that, it is all about those "individuals" Involved in that play. The individual is either successful and helps the team, or he fails and hurts the team. Then the best individuals move up to the next level and keep playing.
That said, there are talented individuals that only care about themselves and actually ruin a team one way or another. Everyone knows this and that is why the players "makeup" is so important to decision makers. Only when those individuals understand the importance of TEAM will a player truly understand what the game is all about.