I really enjoyed reading this nice follow-up of your previous blog. I have again a few minor comments. I hope you don't mind.
Unfortunately, only few physicists are pursuing the latter perspective.
In fact, there are some physicists who do it. Physicists, as anyone else, have to choose their fights as they cannot study everything. At this stage, it is a matter of interests and personal taste. Some topics are more appealing than others, some are less. I guess this is how it is ad there is nothing to be done.
there are two possible explanations for this and they are
- Gravity is very weak compared to other fundamental forces at such scale
- Gravity doesn't exist at such scale.
The former (gravity being weak) on one hand is what is believed by most physicists and it's mainly because gravity appears to be directly related to mass/energy and every elementary particle possesses this property.
In fact, we don’t really care if it is the former or the latter. Moreover, zero gravity could be seen as some super-weak gravity too, so that I don’t necessarily see the two options as exclusive. At the end of the day, the outcome is exactly the same: there is no need to bother with gravity in light of the scales that current particle physics experiments probe.
We still don't fully understand gravity and it implies that there's more to gravity than those concepts.
That’s a nice conclusion, which opens the door to many future developments! I like it (even if I don’t work on gravity at all; as I wrote, we need to choose our fights). ^^
Cheers!