That, and we like to watch a number go up.
If you want a vacation and couldn't afford it or you wanted some cool home gadget and couldn't afford it then sure, delve into your finances. But if that money you're saving is just going to sit around then what's the point? If you already have a rainy day and a 401K or equivalent, then you're good. Ultimately money is worthless if you don't use it.
The reason I say this is because tracking money is not free. It's a mental burden. Do you really want that to be your business? How much mental energy are you willing to give it?
Because it sounds simple until you really want a coffee after work, but it turns out you don't have the budget and then you sit and cry in your car because that hypothetical coffee was the one thing tying you to reality.
I stopped doing it after a few years, after I felt pretty secure financially. And that certainly coincided with more spending on things that I would otherwise not spend on...
For fraud, I think it's basically a matter of whether we can recognize each transaction. You don't actually need to download transactions for that; you can just skim your monthly statements.
For saving, that's tricky because there needs to be that recognition of what categories are likely to increase during retirement versus decrease. I gave that a single pass a while back, and now I have a count each month of those expense categories that will continue into retirement, along with a 12-month average, so I can get a sense of what my portfolio needs to be able to fund after I retire. For that, even though I have Banktivity, I also have to use a spreadsheet.
For taxes, I don't know if anything really makes that easy. It's hard to know what category breakdown you really need to know whether you're capturing all your tax benefit, and my financial software doesn't tell me "oh, by the way, you'll want to split that transaction since some of it has a tax benefit."