Most of that is pretty much true, BUT
1. tubed tires are going to run much hotter then tubeless tires.
2. The bit about tire repair is arguable. In fact a proper mushroom tire repair from the outside will pretty much return the tire to just under it's speed rating and in most cases safely last the lifetime of the tire.

When repairing a tubeless tire there are three things to be concerned with.
1. The actual punctured hole.
2. The inner seal.
3. Tire degradation.

A roped plug patch will stop the leak and get you home, but is susceptible to popping out.
A mushroom plug addresses all three concerns because not only does it patch the hole and stop the leak, but while doing so it also provides a resealing of the inside surface of the tire. So now that the tire is sealed you still have to worry about the tire degrading and breaking down. Water is the main enemy here. In order to prevent tire degradation the entry point of the puncture also has to be sealed. The tire is made up of different compounds, steel belts, etc., and when introduced to salt, dirt, air, and water, rust and other nasty's start to brake the tire down. The plug portion of the mushroom also seals the entrance of the puncture and prevents tire degradation.