I think any baseball writer who doesn't vote for him should have his voting privileges revoked. And yes, I'm aware that no player has ever gotten voted in on the first ballot unanimously. If he is not worthy of the hall of fame who is?
He was dominating in an era when his competition was known to be using performance enhancing substances, and his name did not come up in connection with their use. Voting him in sends the message that great baseball performance will be recognized just as loudly as the message that cheating will not be rewarded has been sent by denying votes for known, and reputed, PED users.