Well yeah exactly.
The assumption that something exists that has not been caused by anything else is either defied by the first premise of the theory if it has a beginning, and even if it does not there is no indication that it would be an entity or being of some sort, not even to speak of any sentience it might posess. It is just as possible that this hypothetical something without beginning would virtually be everything else, including something not completly unlike a universe.
Don't get me wrong, I think it is a very interesting and intelligent theory, and certainly offers new perspectives much more in unison with modern scientific findings on the question of the existence of god,
but in the end it still comes down to faith and belief. So basically what Trequartista said two pages ago
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It is over here actually, but only on a very banal manner. You basically just study the lives and works of famous past philosophers, which is interesting in its own way as well, but normally there is not much discussion about the questions and theories you deal with. It's not bad, at least people come into contact with these sort of ideas, but not really what philosophy should be either.