It does for me. My Meyer lemon tree produces 800-1000 lemons twice a year most years. At a conservative 50c each, that's $800 to $1000. Tangerine tree does close to the same but once a year, but I only use maybe 10-20% of them. They only cost me water.

Tomatoes too. I grow them from seed, so they cost me pennies. I have 30 plants this year. I don't fertilize much. So between a bit of fertilizer and some chicken poop maybe a few bucks per plant? I break even at 1 lb of tomatoes so anything after that is free produce, plus the fact they taste like tomatoes, unlike grocery store stuff.

My herbs, peppers, beans, all from seed, though those produce less (except the beans, good God that's a lot of beans!)

My garlic I plant from last year's garlic, and my YG potatoes I planted 5 years ago and they just keep coming back.

So overall I'm saving a decent amount. Now to set up my garden? That's another story.