can you clarify?.Admittedly established ODI cricketers won't play domestic List A bit they'll have had the grounding in their own domestic such competition. Most test countries still have a 50 over domestic competition which does not clash with other domestic tournaments e.g Aussie Marsh Cup,India Vijay Hazare trophy,W.Indies regional super cup,Kiwis Ford Cup etc. The English set up denies that grounding.That's pretty much the case for most ODI cricketers nowadays tbf.