You are obviously not a native speaker of English, but your eloquence is charming. I fault your logic in a number of ways. The first being the 330 is
not the same as the 320 and I, as you, have thousand(s) of hours on each 'type'. Each and every aircraft type has its own peculiarities and should be treated individually. For example, as an Instructor, I have seen many people being caught out by simply stepping from a 320 to a 321. (extra mass, speeds, wing loading etc)
Etihad backed away from the MFF for safety reasons. I agree, that in a dangerous manner QR has employed relatively inexperienced pilots on the larger aircraft types; BUT do do two things make a right? And I mean do-do .... cos that is what will happen, we will be in the .....
NoJoke made a post previously; and as EPR like yours, I like his. Posts that is.