In my family growing up,being raised as “non practicing” Catholics we ate fish on Good Friday’s because this was simply what Catholics culturally did.
I never thought about it too deep though so it was just more a “social ritual” rather than a spiritual thing.
Also,these days meat and seafood is plenty accessible for many and it’s no longer a luxury to be able to eat meat,people just go down to the butchers to buy it unlike in bible days so it’s really not much of a sacrifice.
Actually,I would think quality fish these days has a higher status than meat and it’s healthier to eat fish eat so maybe not eating fish on Lent would be more of a sacrifice?
What is the point/connection of denying body to spiritual anyway?Ie:is the sacrifice meant to “just” make a person contemplate on and remind of Jesus sacrifices or does it actually affect the spiritual life etc?