Yea I understand...
To some extent it would be nice to have a gun that I could target shoot a decent amount since I avoid target shooting my .243 a bunch (since they are barrel burners). However, it is nice to have something that you know will put an elk down if you saw a trophy elk a longer distances. I suppose I could always buy a .308 down the road for target shooting practice.
I am sure all of your are right...any of the calibers I first listed would work just fine.