But equally you could be proposing it because it precludes a reason which it actually doesn’t
It does, and that's exactly why I'm positing it, because you're trying to portray reality as requiring some sort of underlying reason. I'm demonstrating that there viable explanations where that's not the case.
Unfortunately an infinite regress is only reached if you assume that everything has an external cause.
Everything that we've ever been able to study has been the result of external causes. It's not an 'assumption' to propose that principle could continue, it's somewhat presumptive to make a special case for one thing.
If you say everything has a cause then we are entitled to ask what that cause is.
Yes you are. And, at the moment, we don't know what might have caused the universe - and if we do find that out, we then have 'well what caused that'. That's the nature of an infinite regress, no matter how far back you go you still have an infinite list of questions waiting to be answered.
Your infinite regress is a regress of events of causes.
Yes.
Your claim that this infinite regress needs no cause is in contradiction to your claim that everything needs a cause.
No. You're conflating the individual elements or stages of the regress - which require a cause - with the overall process, which being infinite didn't have a start point, and therefore has no ultimate 'cause'.
So the argument for Uncaused infinite regress is self defeating.
No, your scarecrow with a sign round it's neck saying 'argument for an infinite regress' is flawed, but your straw-man is not the argument that I'm putting forward.
O.