Why solo content have to be in same matchmaking as Group matchmaking?

I am trying to do tower on my alt at lv 48 i’m dying for many reasons not related to this but when im trying to re-renter so i could repeat and finally get it done

i’m getting demotivated with the matchmaking system have to wait 2min till it works , guardians and chaos dungeon works fine if u try a couple times but tower is the worst when it comes to reenter it , have to leave the tower and enter again to make it work which is why i’m not getting motivated to do it again.

Sorry to be this guy but is getting frustrating , i understand AGS/Smilegate is aware of this but the more this happens the less i wanna play , my 2cents.

because the game still need to reserve/create a complete instance for you even though you are entering alone.