But the Leicester man, who returned to play two games for England in the RBS 6 Nations following a career-threatening neck break in 2012, insists the opportunity for younger guys to win test caps in Argentina will only make Lancaster's men stronger in the long-term.
With the likes of both of England's premier hookers, Dylan Hartley and Tom Youngs, touring with the Lions - Lancaster will be forced to turn to new faces - possibly the likes of Saracen Jamie George will get his chance.
And after ending the RBS 6 Nations with a mauling at the hands of Wales at the Millennium Stadium; Croft revealed the boys will be desperate to right their previous wrongs in South America.
"The fact that the Six Nations did end on a sour note, this is the next opportunity for whoever is in the England squad to go out and improve and make sure this side keeps on growing," said Croft.
"There will be some England boys on the Lions tour and that is only a good thing in terms of experience as whenever we meet up in the Autumn and for the next Six Nations there will be more players with more caps, more experience whether that be with the Lions or England.
"I didn't expect to play in the Six Nations at all because Stuart Lancaster said I wouldn't be considered and then to get called up in the last couple of games was brilliant.
"I obviously wish it had ended on a cheerier note but it was a big boost - hopefully the guys who do go to Argentina can turn things around in our absence."
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