The general response to this is to claim that the physical Moon is not tilting, but that it is only the Moon's day and night that tilts to perspective. This is also incorrect, for the same reasons previously discussed, since one would have to see different parts of the Moon's day and night:
The same issue occurs. The Moon Phase diagram I provided previously shows that different observers would have to be viewing different parts of the Full Moon.
The only thing your previous diagram shows is that you have not understood the round Earth model. As previously mentioned, the Moon appears to move in the sky mostly because of the Earth's rotation, not of its own movement : it orbits the Earth in about 4 weeks. The orbit of the Moon around the Earth is what causes phases.
For example, let's say the Moon is in M1. E8 E1 and E2 see a full quarter, E3 and E7 see a Moon that is rising or setting. As the Earth spins, everyone will see the Moon rise and set - but they will all see a first quarter, only slightly fuller as time goes by and the Moon moves on its orbit. The Moon is far enough for everyone to see the same side, but the orientation will depend on the latitude.
A few days later, the Moon is in M8, and the same happens : everyone sees a waxing gibbous rise and set. Etc.
The so-called "tilt" is not involved to explain the phases. It's not even really a tilt : just the illusion of a tilt.
So, how does this work with "extreme perspective" as the answer to this?
It's still just perspective. And it only has to account for the angle of the terminator, not the phases. I'm not sure what "extreme" perspective is, or if it even means anything, or if the word "extreme" is just there for dramatic effect. Maybe
this video was already mentioned, but I think it explains quite well what is going on. Perspective can play some tricks on our brains.