I think one of the reasons overfeeding is such a problem for us is that feeding the fish is a great interaction. If I fed my dog every time she asked, I'd have a dying blimp hound. It's the same with fish. But I enjoy caring for both, and try feeding them properly.
There's only so much prepared food though. I have a colour flake, a kelp flake, bug bites, spirulina discs, shrimp pellets... I can vary the diet, but I could give myself a varied diet out of the Costco freezer section, and die sometime soon from it.
I need about 5 minutes a day to manage my live artemia nauplii, and 15 minutes a week for my grindal/whiteworms, which I rarely feed to fish not being conditioned to spawn. I have frozen zucchini coins, which go to some fish. I took some time to grow them in my garden. In warm times, I harvest mosquito larvae, daphnia and live bloodworms.
I could make frozen mixes - I've done it a lot in the past. I could buy frozen foods.
I have spent enjoyable time learning what my fish eat. One size fits all gets you an ugly suit. I try to adjust the feeding to the fish species, and that takes a little time.
There are 2 smart young guys around here who want to find live foods out in nature, and I can see where I'll take a little time to go out into the woods this Spring. If you get to the mosquitoes before they hatch, that can be a lot of fun. Ideally, I won't buy Daphnia eggs this Spring, and will take a chance on that.
You would be surprised,
@Magnum Man and everyone else, what a difference live foods make on fish in terms of colour and activity levels. That dopey looking insectivore Cichlid that cruises along looking bored can become a different creature if its hunting switch gets turned on.
Does all this take time? It does, but I was doing this long before I retired. It takes time to watch football, go fishing, play golf, crochet your own underwear, go to a movie etc, but if it's fun to you, it's worth it.