I used to love opening day but I got over it.
Now I start up in the headwaters where no one else bothers to go.
Then in the afternoon after 80% of the yahoos have gone home I'll move downstream for some easy pickin's
Here in CT the state still has opening day only because they sell more fishing licenses that way.
It's a family outing or a socializing tradition for a lot of people. They go once or twice a year and then they're done, but the state still gets the revenue.
If you want to fish, there's always a place to go.
There's plenty of C&R trout management areas that are open all year.