Ok, as WD has been useless so far I have investigated myself.
I run the WDIDLE3 utility and confirmed me that the timeout to park the heads was set to FOUR seconds! Now, I appreciate that on a laptop this is done to save the heads but 4 seconds seems eccessive to me?
I changed the value to 5 minutes and now the count has massively slowed down.
What do you think about that? Better keep the heads parked as much as possible and have 1.000.000 cycles in 3 years or reduce the timeout and risk to damage the disk? I also believe there is a shock sensor in the disk so heads should park automatically before it’s ‘too late’.