It's not a huge deal but...

[FDru]

I kinda hate having to choose between perfect catch and treasure box. It seems like treasure is generally worth getting but it really sucks when it's like 2 pieces of wood.

[D's Journal]

Get treasure hunter talent then.

[Narvad]

Originally posted by D's Journal:

Get treasure hunter talent then.

If the fish never goes near Treasure(which happens more than not), it's still ruins your Perfect Catch.

[Buffmania]

Treasure is generally better the further your cast is from shore. If you get far enough away it'll both reduce the likelihood of getting some of the less valuable items and enable some of the best.

Using food that increases luck or the luck ring will tend to get you more items and also change the small glow and magnet rings into their larger versions.

There's a special bobber that you can learn to make by doing a quest for willy that increases fish quality by one level removing the need to get a perfect catch for iridium fish.

[Psycho]

also if you catch the fish and treasure at the same time with it being a perfect catch, you get 5% more fishing XP

[supersand]

treasure is always worth you can get some good things out of it including roe to help pay for the perfect catch xp loss after reading a book (you can get that book in the treasure chests too)

I've gotten early gold / iridum bars, high level weapons, and even a Prismatic Shard from fishing chests in past runs even before the update so they are 100% worth even if it is junk sometimes.

[maestro]

Use a mod? There's a few different ones out there.

[DaBa]

The game already solves this problem. There is a special tackle that increases quality of the fish by one, meaning iridium fish even when getting treasure. You don't have to choose anything, just use the tools the game gives you.

Also, treasure is ALWAYS worth going for, sacrificing the perfect catch and decreasing fish quality is of no consequence when you can get free stuff, often really good stuff.