I understand your position: EY ignores many other interesting interpretations of QM, like retrocausality, and if you goes deeper in the field, his position may seem oversimplified.
However, it is not equal to the claim that universe is finite in space and in time. Even if some form of infinity (or very largeness) is possible, like cyclic universe, it creates possibility of existence of very large number of civilizations in casually disconnected regions. This idea may need additional analysis without simple linking Tegmark.
I understand your position: EY ignores many other interesting interpretations of QM, like retrocausality, and if you goes deeper in the field, his position may seem oversimplified.
However, it is not equal to the claim that universe is finite in space and in time. Even if some form of infinity (or very largeness) is possible, like cyclic universe, it creates possibility of existence of very large number of civilizations in casually disconnected regions. This idea may need additional analysis without simple linking Tegmark.