But former England centre Greenwood claims it's the right decision, citing the break he was given in 2002 when the Red Rose toured the same region as the perfect example.
The next year an invigorated England walked away with the World Cup, and Greenwood claims following a similar path is sensible with the 2015 World Cup very much in mind.
"I never toured Argentina, I missed the tour in 2002, Clive (Woodward) decided to give a few of us a rest which is exactly what Stuart Lancaster has done this time," said Greenwood, speaking in his role as an ambassador for the J.P Morgan Premiership Rugby 7s.
"It's midway between a World Cup cycle, there's disappointment for some of them that haven't made the Lions tour.
"I totally agree with the squad Stuart has picked, we have nine Lions which is super, then there are some rested players - Brad Barritt, Chris Robshaw and Danny Care who between them have probably played every game since Lancaster has taken charge.
"It gives the chance for the younger generation. There are real chances across the board to be demanding their inclusion come the next EDS squad."
The J.P Morgan Premiership Rugby 7s kicks off on 1st August at Kingsholm with rounds at Franklin's Gardens and Allianz Park and the Final at The Recreation Ground. For tickets and more information visit: www.jpmorgan7s.com or follow @jpmorganrugby7s