Getting into something like playing online games would mean that you need to do further research so you can improve and learn on how the game is played. That would not be the case with the game League of legends. You could basically do all the research all you want or watch all the clips that you want but unless you are actually the one playing and grinding, the learnings will only be limited. This is because of the Placement matches lol.
What does it do?
Basically, because of it, you will not be able to play with professional gamers or better gamers unless you are up to their rank. We all know that the best way to improve with these types of games is practice and daily exposure against better opponents. That is how you can ensure that these Placement matches lol can you help you improve to the highest level. Would learn something if you were playing against a rookie? Or would you learn something if you are playing against a pro? That is the simple logic of it?
What tier do most professionals or good players play?
Well, they are either on the Grandmaster tier or challenger tier or rank. How the games are played on this stage is far from different from the previous tier. Let us use a good metaphor in explaining how they are different. Like in basketball, if you are facing a weaker team and you are a good player, you can easily win or score the basketball using isolation plays. If you are a great team, isolation plays will not get you anywhere, you need to have a game plan, and you need to share with your teammates. That is the same concept when you are playing against the pro. If you think you can carry the load alone against pro players on that said tier, you have a long way to go.