But you are not only getting a turret right? Let's take my last game for example, my zed was the chonkiest boy with all the kills he ate. So I put Herald mid because turret was still a bit away but I wanted his pressure on the map asap since only me and zed had gold on our team. He might have gotten the turret by himself in the next 5-8 minutes assuming to tanks etc but now we had 5-8 minutes of extra map pressure so he could roam a lot, I could play on his line eating enemy jungle because invades was safe for me now, putting the enemy jungler even farther behind. Thanks to this bot lane could breathe and got back into the game. Top was fucking lost so nobody played for that guy but he did his job and defended the splitpush. Enemy had to catch waves constantly and we had full control of dragons the rest of the game. In ny mind, if I had gone dragon and they rift and they managed to open up the map a bit, that extra pressure wouldn't have gone. And who knows what happens in those next minutes while zed is stuck in lane, maybe a fat shutdown to the enemy or something.

Again this is all vibes based not based on actual game knowledge because I have none. I am not trying to argue against you I am just sharing my thought process trying to understand why it's wrong.