Why do they sell this stuff?

I was in my local big box store again, this time for some stain. I came across a two in one stain and polyurethane concoction. It boasted a nice color and a two coat process that would leave a nice matte finish. So I bought it.

The next day I decided to look on the internet to see if there are any tips or tricks to using the stuff. To my horror, there is nothing good to say about the stuff at all. Everyone is recommending to throw it out and do the stain first, then urethane after. Thankfully, I have not opened it yet, and will return it and get the stain and urethane - separately. Whew! That was close!

In the meantime, I used the wood filler to close up the gaps and cracks (crappy whitewood). I will have to go back and sand it smooth before I can treat for staining. I hope I can get the staining done this weekend. I also have to drill the pocket holes and pilot holes too!