You basically just stated your fish's life value is directly related to how much you paid for them (and what you are hoping to get out of them).
Now tell me, if that were true, why would I have taken the bala a few days ago? Are you farmiller with that story?
My neighbor was going to flush the bala shark she had, but offered it to me first.
Now
I have to deal with finding it a home,
I have to feed it,
I have to do waterchanges.
If I only cared about its price, why would I have taken it in? Why would I spend my money to buy it proper food?
Its like not being invited to a party when you were a kid - usually it was because their parents had a set limit of how many kids could go, so the party kid had to chose 5 out of 10 of his friends.
5 of them made the cut, the other 5 didn't,
Does that mean HE couldn't have handled having all 10?
No.
See, time is like my parent. It has a limit, and my limit requires me to make a desicion.
My desision has been made, and the 4 Deltas made the cut, the 3 VTs didn't.