OK. I have a question

I think this is a legitimate question, but you tell me.

I read a tweet this morning stating that the evidence is against charter schools.  I also read a tweet of an opinion piece about districts preventing the replication of successful charter schools in New York.  The main evidence that was mentioned refers to state test scores, but most of those who write against charter schools also write against high stakes state testing.   In other words, we stop successful charter schools.  We judge those that are not successful on measures that we don't even like to begin with.  It seems to me that while those who support charter school policy are being accused of supporting an ideology without evidence that those who oppose charter schools are just as guilty of supporting ideology.

So my question is how can charter school opponents use a measure that they do not even agree with to say that charter schools aren't successful?  If education is something besides performance on standardized tests, then why don't we measure all schools on those other standards rather than measuring charter schools based on a faulty standard?