Sure, but if someone told me they were getting up for a walk on a flight because they didn’t want to get DVT, I wouldn’t go on a tirade about how their life was ruled by fear. That’s what my original comment was intending to address.
but the point is that walking around a plane is relatively safe, and severe turbulence is rare, so much so that you'd probably better off walking around fairly regularly if only due to less DVT risk