Ahhh, but saying there is no reason would be a gross exaggeration. Science itself presupposes the principle of sufficient reason(PSP).
What's crazy to me personally is that you would sit here and argue against it. PSP being false would mean that our cognitive abilities would be unreliable and I couldn't trust your reason for it being false in the first place which is a lose-lose argument.
That's besides the point. The biggest arguments against PSP have been reductio ad absurdum. There are arguments from a chance-based reality perspective (because I know you guys love pointing to quantum mechanics). However, nothing in Quantum Mechanics points to a flaw in the weak principle of causality. Whether quantum mechanics accepts causality entirely also depends on the interpretation. So pointing to Quantum Mechanics would not be a strong argument against the universe being without cause.
Edit: Btw, I apologize for calling principle of sufficient reason "PSP" instead of PSR. I always renamed it "principle of sufficient purpose" in my head (haha).