Should we care if pitchers use pine tar?

Last night the Yankees got demolished by the Mariners, 10-1, but the only thing fans were talking about after the game was Yusei Kikuchi’s apparent use of pin
Bronx Pinstripes - A New York Yankees Community for the Fans, by the Fans

Baseball's Sticky Secrets

I've been watching John Means pitch and it appears he is digging into his glove for some pine tar. Watch til the end where his glove literally resists when he pulls his

Rubbing Mud: Rubbing Not-Really-Mud - Baseball ProspectusBaseball Prospectus

MLB pitchers using pine tar is against the rules, but everyone's OK with it : r/baseball

Should we care if pitchers use pine tar?, Bronx Pinstripes

Gerrit Cole's sticky situation: The latest chapter in ball doctoring - Pinstripe Alley

The dirt on doctoring baseballs

Arm Care for Pitchers Former Rockies starting pitcher & Arm Care Specialist on how to prevent arm injuries

Indians' Trevor Bauer talks pine tar, spin rate, experiments and more

Why Pitchers Use Pine Tar

Buster Olney: Has baseball's pine tar problem gotten worse? - ESPN - Buster Olney Blog- ESPN

Should Pine Tar Be Legal For Pitchers?, by The Caught Looking Show, Caught Looking