Yeah, those are some weird fretting hand movements, maybe, but there’s really no theoretical reason you SHOULDN’T be able to do that.
We talk a lot around CtC about focusing on building out the stuff that comes easily to you and developing a style around that, but I think that’s true to a greater extent for the picking hand than the fretting hand. There are technical challenges in, say, being a downward pickslanter and playing, say, that first motif starting on the 5th fret B string with strict alternate picking starting with a downstroke that make it technically awkward to do, but those aren’t really present in the fretting hand - I’d be more inclined to woodshed something “hard” like that, where it’s just getting your fingers used to motions that initially feel awkward, than I would be about trying to work through a picking motion that just isn’t going to work at speed.