It should be admitted that the landlord's point of view is reasonable. There are indeed celestial bodies that generate huge energy because of friction, such as accretion disks of black holes, but it is debatable whether it can be extended to explain the source of star energy.
Aside from the tedious and abstract quantitative calculation, from the qualitative analysis, there are at least the following problems in the landlord's point of view:
First of all, every atom of a star in a plasma state can be regarded as a particle. Don't they accept external forces? Wrong, they are attracted by gravity from the center of the celestial body, so they will move in an approximate circle.
Second, even if a sphere is layered, if each point has the same angular direction and the same size, there will be no friction between them. At present, there is no evidence that the rotation speed of the internal movement of the sun is very different from that of the surface. Because the earth satisfies this, although it is layered, it does not release a lot of energy because of my friction.
Thirdly, the relative motion speed between the center of the object and the poles of the rotating shaft is very small, so the energy generated is much less than the surface and equator, and the surface temperature of the sun is almost uniform, and there is no law that changes with latitude (this is the most obvious loophole in the landlord's point of view).
Fourthly, friction is only a process of energy transfer, and its energy source is the kinetic energy of object motion. It is easy to calculate the moment of inertia of the sun, and then deduce the energy of rotation. How long the energy radiated by it can last is also a problem that elementary mathematics can solve. Without a large amount of external energy supply, this effect cannot last. What is the source of external energy? Through what channels? The landlord tried to muddle through at first. I'm sorry that you misunderstood Newton's point of view. Any high school student can find this.
I'm glad to see that the landlord can let go of his thoughts. The scientific method emphasizes: "Make bold assumptions and carefully verify". In contrast, the second half of the landlord needs to be strengthened. The person who questions a scientific theory is the author himself, and only after careful consideration will it be made public. Here, I would like to put forward some of my views and ask the landlord to consider them carefully.