That's not what they said. As someone just reading through the thread, it's very obvious to me and I thought "clear strawman" before even seeing them reply. Don't then also turn to gaslighting when you're called out on it. That was not their opinion, you put words in their mouth and twisted what they said.
Their point isn't difficult to grasp. We will continue to invest in both starters and potential future talent. We've always done this, it's very normal.
Garnacho is one of many examples. As is Amad. The idea being that you can get a player in for a few million up to an Amad level fee, to prevent paying 60/70/80 for that player 2/3 years later.
Obviously there has to be a balance but you need to invest in both, with the plan being that if you get the youth investment correct you don't then need to be buying 3-5 starters every summer. If all you buy is players to go in the starting 11 then, with the price of players as it is, you're going to spend a fortune consistently to keep turning that over.
I know many fans like to fantasise every transfer window about the club buying 5-9 players to go into the starting 11 and they enjoy making horrendous looking squad lists, featuring the new multiple teams the new look squad can formulate, but it never actually goes like that in the real world.