Even then it might depend where and when you buy the kit. Full sets can be comprehensive, but tool manufacturers often strip them down to the bare bones as many customers care more about price, than about content.
One recent example that comes to mind was the purchase of Makita's 12V mini circular saw, which I bought last year. This was a rare occasion where I didn't buy the bare tool and got a good deal on a kit. I wanted a couple of extra batteries and it was more expensive to buy them separately, than to buy the kit that also included charger and a nice case. What it didn't include was a fence, which is usually included with any circular saw! Rather than pay the buggers extra, I repurposed one from an old tool.