Yeah, I agree with this. I think more interesting about the Focals is that their dispersion profile is fairly unique. Typical domes start beaming/narrowing around 6kHz, focal maintains a wide, almost constant-directivity-ish behavior up to about 9-10kHz. It seems to add a sense of scale in the highs
So I largely agree with you, but my overall impression is that a well-controlled wide-directivity speaker can seem similarly sharp to one with good narrowish directivity. (Most wide aren't quite as well controlled as narrower speakers though).
To me the analogy is roughly like watching a movie on, say, a 4K 32-inch monitor vs a 4K 100-inch projector. The same resolution, but spread over a larger image on the latter. So in a sense the projection/wider speaker is less sharp, but the 'resolution' is the same.
I know some people don't quite see it this way, just my own impression. I usually don't really feel like im losing much if any 'resolution' with wider speakers.
There's also the advantage that wider speakers have in reducing interaural crosstalk correlation, though it's hard to quantify quite how much this matters.