[2024] Why has ARAM been out for over a decade and I still can't reroll without losing my first champ?

When we reroll, can we just get a little pop up that gives us a private choice between our current champion and the rerolled champion before it goes to the bench so that we don't have someone sitting on a champion they dont like who spam the bench for whoever rerolls?

I tend to only use one reroll per aram unless I REALLY need the 2nd, but its so rare. This means if I get a champ I kinda like - or even really like - I will still use my reroll knowing I'll go back to two at the start of next ARAM. I do it for for 2 reasons:

1. To give my teammates another option
2. In case the rerolled champ is even better than my current one

But if someone snatches my preferred champion, it screws me over for doing something nice for my team...