Far from it, I replied to your last sentence  

"The only alternative is for the newspaper to ignore the matter raised, to NOT re-examine it, that is, to declare itself saturated in anti-male sexism."

sooo would you like gender neutral book review on a 50/50 basis?
Is it possible that the G&M reviews new books that could be of general interest and possibly hasn't had that many submitted by male writers? Is that a possibility??
BTW to the best of my knowledge, reading the G&M in print or on-line is a voluntary choice, however choosing the material to be published is up to the G&M. i.e. you don't like it, you don't read it. 
Very simple principle. ;)