If anything I would submit to you that it is far more nonsensical to assume that any real progress towards the BLA is being made behind the scenes, just like it was nonsensical to assume that Cofer Black was doing great things behind the scenes all of the other being wind ups that never result in knockout punches.
Nonsensical means that - nonsense.
An opinion can be wrong (in your opinion) without being nonsense and usually is.
The history alone supports a reasonable assumption that at least with a company managed the way NWBO has been historically managed, if we are enduring a long wait and nothing much appears to be happening, it likely means that nothing much is happening.
That assumption could well be wrong - but again, leaving aside other factors and on the basis of the history alone, it is sensible, not nonsensical to hold that view.