It's only arbitrary if there aren't good reasons.
Dozens of reasons have been given in philosophy, it's up to you to decide if any of them work.
One of the big differences would be to point out that the universe is completely composite, whereas a foundation could be purely simple.
Josh Rasmussen is a great communicator about this!
https://www.youtube.com/watch?v=TX79xXgi44o&ab_channel=TheUn...
It's only arbitrary if there aren't good reasons.
Dozens of reasons have been given in philosophy, it's up to you to decide if any of them work.
One of the big differences would be to point out that the universe is completely composite, whereas a foundation could be purely simple.
Josh Rasmussen is a great communicator about this!
https://www.youtube.com/watch?v=TX79xXgi44o&ab_channel=TheUn...