It cant hurt, but I wonder if they have to pass through a bird or mammals digestive track first for better germination? Some berries/seeds are better sown/scattered that way by nature. Cuttings and cutting transplants just give you an edge and likely a higher success rate. By the lack a replies I would guess the general answer is no. I would think the effort would be like tossing out mini snacks for the critters. But I think many of us grab and strip seed from plants as we walk... I have, just not dogwood seeds.
You might wanna try a seed tray and or an area in the garden ... could even just try planter box. I have a cutting bed I made filled with sand that I rooted out a mess of red osier cuttings in that would work too. It would be an experiment as I still feel cuttings are so much easier.
Seeds planted in jugs(planting medium in gallon water jugs) and tossed out into the snow banks from January thru March have been the best seed sprouting/ growing system for me so far. I've used that system for starting daylilies and apple seeds outdoors. Tried it with sumac-no germination. Have not tried it with dogwood.
Have not tried any of the American native dogwoods, but the Eurasian Corneliancherry dogwood, C.mas, and its 'cousin' C.occidentalis, have 'double dormancy', requiring additional steps &/or time in order to get them to germinate.