Should fishing be included in game?

Currently the game is set up to allow two of four food categories in short order without finding tech (carbs and vitamins). Would opening protein in the same way be game breaking?

It would allow early game increases in health rating, which would improve pop growth rate around the same time the expectation is that you'll be using the beacon to increase population. Also, it would just be fun to have.

The fishing industry could be limited by water pollution and/or over fishing causing diminishing returns for effort. It could even be that pulling fish out of polluted water could have a magnifying effect on health loss.