They don't have very many good choices.
I was in the service in 1971-1972, and all branches of the military were frantically trying to offload people at the time. I got a 7 month "early out", and it doesn't bother me a bit if President Bush got one too.
Neither does it bother me if he "pulled some strings" to get into the Guard in the first place. That's the way it was done back then - you had to know somebody to get into the Guard.
If you didn't know anybody, you got drafted like I did. That's just the way it was. I'm not saying Bush used family influence to get into the Guard, but I wouldn't be surprised if he did. I just don't care one way or the other.