That's not context, though. Context is who took the photo, when they took the photo, what the person taking the photo's qualifications are and what they actually know about the jar itself.
Besides, doing my own little research spree (which was literally five minutes of Googling the phrase "carving jars from alabaster" turned up this website page:
Hand Carving Process For Egyptian Alabaster, which simply (if not wholly visually) describes the process of how Egyptian Alabaster is shaped and form by modern artisans to make jars out of alabaster as they would thousands of years ago. And in fact, this process is expanded upon here,
Crafting Timeless Beauty: The Art of Carving Egyptian Alabaster, which this time has a video, which I sadly can't link below (the actual process beings at about the 2 minute mark) and we see the exact process of how it's done in a traditional, but clearly complex and skilled manner.
But the point I'm making is that we know what processes the ancient Egyptians used, because there are still people using those same processes! We know how they did it, but you just refuse to accept that as evidence for anything. And your claims of the ancients using much more advanced technology than you claim they had just poos all over these people's hard work.