don't get me wrong, I mean low cracking pressure better for the whole system, and it is not the normal plastic check valve we are talking about here, we are comparing $30+ industrial grade check valves, especially the Parker or swagelok one to a generic check valve.
Debris stuck at the valve seat is not much difference if check valve has a 1/3 or 10 psi cracking pressure, and I think OP aimed at the the wrong issue, it is not the lower cracking pressure of the check valve that welcome trouble, but the build quality of a generic check valve compares to the swagelok or parker.
I have never seen an explanation of why low cracking pressure is better, other than it may make leaks in the tubing if way too strong.
It is easy to explain, you can see the bubble counters with build in check valve(low quality), if the springs in those check valve are too strong, the gas flow through bubble counter is sudden rush of bubbles in intervals.
Same as high quality check valve with high cracking pressure, we don't want this sudden rush(fluctuations of pressure), we want linear flow of co2, so lower the cracking pressure, more smooth the flow rate.
Swagelok 1/3 psi is the best, up to 5 psi, normally more than 5 psi you will notice some weird behavior of gas flow on your co2 system, ...