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
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Why Pine Tar Should Be Legal for MLB Pitchers

Best Pine Tar & Baseball Rosin

Why do baseball pitchers use pine tar? - Quora

MLB pitchers doctoring baseballs are changing the game - Sports Illustrated

Does pine tar benefit pitchers? - Over the Monster

Why do baseball pitchers use pine tar? - Quora

Should Hitters Be Allowed To Use Pine Tar When Pitchers Can't? My Thoughts

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

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

Get a grip: La Russa's World Series decision to keep a lid on pitching's Pandora's Box hints at MLB's sticky spot

MLB pitchers cheat, too. They use pine tar instead of trash cans., Sports

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

Baseball's Sticky Secrets

Maddon, Johnson heat up pine tar spat