>>Since it’s so common, I assume you will be able to take a picture similar to the ones we’ve see and post it for all to see just how common it is.<<
That’s already been done. A lot.
However, the reason this is even being discussed is that, although it is a common contrail, it does not look all that common. But it is also not all that uncommon. It is one of the pretty ones.
And over the fifty years of heavy aviation in the socal area (minimum) it is almost unheard of that anyone has raised so many questions about one of those contrails that the FAA and Pentagon still can't identify an aircraft in that air space over 48 hours later.