I do this all the time. I see so many brainless, low-effort posts all over the internet that I don't want to add to the pollution with anything I'm not confident is either informative or funny.
But I also want Lemmy to grow and thrive, so here I've been making more of an effort to try to finish and post even comments I'm not so certain about. I figure that has to be better for the site than contributing nothing at all.
I dunno who told you the Wii U was 720p-only. Mine ran at 1080p all day, every day - albeit some games used upscaling to reduce the graphical workload.