Esports isn't directly profitable.
However, it is some of the greatest MARKETING.
If an entity's portfolio is evaluated purely on the merits of the product they create, generally the market for that product is smaller. Marketing draws the attention of a wide array of potential buyers, and "sports" are some of the greatest marketing mankind has created.
Remember: What Football, Basketball, Baseball, etc are selling isn't a sport; They are selling merchandise! Seats. Clothes. Video Games. Lower league franchises. etc etc. The players and the game are actually their primary EXPENSE.
Yet, I want you to think of something: Baseball. Declining as a sport, selling less merchandise. In the modern world, Baseball is turning out to be a failure. The Moneyball strategy of trading/calculating the best teams, while creating more competitive, stronger teams, has taken away irregularity at the fringes, and that irregularity is what drew fans to baseball. Games last about 2 hours longer. It's harder to tell who has a better franchise. People generally are "bored" with it.
I'm not saying League has the same problem.
In fact, League is doing the opposite:
-Higher irregularity is creating shorter games.
-Balance (imbalance) changes are directly affecting the fans (Players)
But......
It's still the right call to support Esports. Esports are what has attracted about 60% of this game's player base.
Also, it's worth noting: Riot isn't selling Summoner's Rift, or ARAM, or TFT. They are selling a dreamscape of lore behind them. A world of larger than life characters at war with each other, that can be applied to ANY platform they come up with. They are selling Skins/identities for that world.
In other words, a decline in Summoner's Rift Subscription doesn't actually mean Riot is hurting itself. It simply means some other platform they own is going to be their next revenue source.
TFT has been so energized that for the first time in .....FOREVER..... Riot has wait times to login to their portal.
Ie..... Riot can afford to make bigger mistakes with SR right now, simply because their other products are doing VERY well. (Whether they SHOULD is another matter entirely)