They play so much limited over cricket that they trust instinct too much.
By limited over cricket, I assume that also includes T20.
OT, this whole argument about player burnout that keeps popping up in the media time and time again is the biggest load of tripe. Yeah, players who IMO are grossly overpaid as they are (compared to the greats from 10-20yrs ago) complaining about playing too much cricket, only to board the next plane after an international series to play in some lucrative T20 tournament. What a joke. I do miss the old Ashes tours that were 6-tests. Would love the Ashes to return back to 6-test series, but will never happen.
England generally play 6-7 tests per summer, so burnout cannot be an issue for them. At the domestic level, their priorities are still heavily centred and focused on the longer form of the game (as is evidenced by their County cricket season, where more games are played than Sheffield Shield). When we became a dominant force during the Taylor/Waugh years of 1994-2004, there was a very strong emphasis on Sheffield Shield cricket and most of the test players regularly turned out to play for their states in Shield cricket, let alone many of the upcoming stars came through Sheffield Shield. Also, there was the AIS (Australian Institute of Sport) and many of the talents during the early-mid '90s such as McGrath/Ponting/Warne etc. were spotted through the AIS system during Rod Marsh's tenure. Nowdays, I don't hear much about the AIS. Infact, I haven't heard much about it for many years.
When Ponting became captain (not long after James Sutherland became CEO of Cricket Australia), the priorities slowly shifted more towards limited overs cricket (coinciding with the advent of T20 cricket) and now you had players being picked for test matches off the back of limited overs form rather than the mode of cricket that was closest to test matches - Sheffield Shield.