I was explaining this to my daughter in quite simplified terms the other day- we evolved to taste sugar and enjoy it because finding a sweet edible plant meant we had a source of energy to help us hunt that day. Pretty useful if you're a hunter-gatherer.
So we seek out sugar. Now we can get it whenever we want it, in much more massive quantities than we are supposed to be processing. Most of us are addicted. I'm not an exception.
It sorta depends on the ingredients you're working with, some tomatoes are sweeter or more acidic than others. Where I live tomatoes tend to be somewhat watery and lack a bit of intensity of flavour. If I'm making sauce at home I'll taste a bit and add some sugar and/or red wine vinegar to balance out the flavour.
Not only it tastes better every time, the flavors in the homemade sauce are way more pronounced than the ones that are supposed to be in the bought one
It honestly isn't that card to take a can of diced tomatoes and throw it on the frying pan, add some garlic, olive oil, salt, and herbs of your choosing, reduce to a suitable volume, good to go. I'm surprised more people don't do that.
Feel free to share your recipe though, I'd be curious how others do it
even just a heap of "Italian seasoning" thrown in there makes a passable sauce. A can of crushed tomatoes and a can of tomato paste and a handful of Italian seasoning (with salt to taste) and you've got a decent college-kid budget sauce.