Nonsense. Every 120 operator/owner I know has been authorised to do this themselves, after a short training session. It takes 2 minutes and arguably formalises a normal check in the thinking man’s list of responsibilities!
Don’t mix the 15h/7days inspection (which can be performed by an aircrew member) with the EASA AD 2010-026-E which can only be signed of by maintenance certifying staff (at least in my country and if operated under 965/2012)