It's only a dumb point to make when Democrats do it. When they did it about Obama who golfed half as much as trump it was legitimate. Just ask them. And the stupidity of it all is trump himself complained about Obama golfing so much. Here are just a few examples...

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Trump tweeted 27 times about President Barack Obama’s golf habits between 2011 and 2016, according to SB Nation. Here’s a random sampling:

“While our wonderful president was out playing golf all day, the TSA is falling apart, just like our government! Airports a total disaster!” (May 2016)
“President Obama should have gone to Louisiana days ago, instead of golfing. Too little, too late!” (August 2016)
“Obama has admitted that he spends his mornings watching @ESPN. Then he plays golf, fundraises & grants amnesty to illegals.” (December 2014)

https://www.cnn.com/2018/01/03/politics/donald-trump-golf-analysis/index.html

Of course then there's this.....

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“If I win I may never see my property – I may never see these places again,” Trump said at an August 2016 campaign event. “But because I’m going to be working for you, I’m not going to have time to go golfing, believe me. Believe me. Believe me, folks.”

https://www.cnn.com/2018/01/03/politics/donald-trump-golf-analysis/index.html

So you can understand why they may be a little salty when someone broaches the topic.