The Stoke City keeper was part of the Euro 2012 and Olympic Games squads and says it is no problem for him dropping down to Stuart Pearce's squad, who face Italy in their first game on Wednesday.
Indeed, Butland believes he has more chance of impressing Roy Hodgson with his performances for the U21 side than he would training with the senior squad and sitting on the bench during games, much as Jack Rodwell and Alex Oxlade-Chamberlain did.
"I think it shows that those who got there deserved it," Butland said. "They got there through their performances for their club but most importantly their performances for the U21s.
"The way Jack and Alex came on against Brazil is only more motivation for us that we can get there.
"There is no secret that players get older and the new crop has got to come through, we can only perform the way we can and make Roy Hodgson's decision as hard as possible.
"That's the view from everyone. If we are good enough, we'll get the opportunity to go. I don't see the fact that I've come down to the U21s as a bad thing. Conversations were had and this is probably the best thing for my development.
"I know that going to the senior squad would be fantastic but in terms of game-time and getting that development it would be better to stay here.
"I feel really good in this squad and I feel part of it. But this is the step to the next level and I feel very confident that if I get the opportunity to have a good tournament, and then a good season next year, hopefully in the Premier League with Stoke, then who knows, but that's the target, to go to Rio."