There is no reason for the clien not to have an invisible mode
I have made countless threads on this. So have many others. Yet Riot refuses to acknowledge the subject. It has been about nine years since League of Legends was released, and we still have no invisibility option in the client? Let me put in in perspective for you guys.
The Manhattan Project started in 1942 and ended in 1946. That's 4 years.
It took 4 years to develop the atomic bomb.
The client has gone without an invisible mode for EIGHT YEARS. I know for a fact that an atomic bomb is vastly more expensive and complex than an invisible mode for the client. Therefore, I've arrived at the conclusion that Riot doesn't care.
They just don't. Sorry introverts. Guess we can go fuck ourselves. Would take less than a day's work but nah.