that someday is so far away and you are comparing the situation of the far future with the current price.
the price can rise so the fees+the small block reward can give enough money to miners to continue operating in the future.
Are you a miner? Just asking. Do we know what the future brings? What if the future have the same price as it is now or will just stay at the same level. We dont really know that right?
The price will most definitely rise during the halving but the practicality of btc isnt even worth it, just take everything away and just imagine how bitcoin is going to grow, you cant because you will never know, even the miners do not know if btc will go up or down because they just make small money by getting all of the transaction fees.