LAG of legends

Hello I like everyone experience lag sometime in our gaming experience. Now league of legends has set lag check up, but why? You wouldn’t need to setup lag check if you just put more servers in the many regions you have your game in. Now you might be thinking “that’s a lot of money to put more servers down” wtf are you talking about last time I check league of legends was making about 1 billion out of their game. If you really cared about your players, you would put more servers down to help with the latency.