The problem is that even if its official designation is "616", it still
can't be the same 616 as the comics universe.
Literally cannot be. There's too many wild differences.
Just by way of obvious examples, this is what Earth-616 Nick Fury looks like, in the comics;
And here's what he looks like in the MCU;
There's a pretty glaring difference, there, once you look past the eyepatch.
Meanwhile, here's the Nick Fury from Earth-1610;
Who
does look exactly like the MCU Nick (since they designed him after Sam Jackson, with permission, and that's basically why we've got him in the MCU today, so it's not a coincidence).
The MCU is
not the same continuity as the Earth-616 comics, and it's baffling that people try and make that argument.