Cycling is a lot more expensive than golf, and seems to be the new wealthy middle-class beer belly sport.
I've been riding a bike for more than 30 years, and I can't tell how how different it looks at the parking lot today - middle-aged men, 20lbs or more overweight, showing up in $100,000 cars with $25,000 bikes that they haven't ridden since last week's group ride, and every kind of electronic bike gadget you can imagine dangling off of them. They're there to show off their affluence and to compete with each other over who has the most expensive bike.
They never ride except at the weekly ride. They suck wheels like a baby at its mother's teat. They refuse to do the work when it is their turn - because they can't. Their solution to not being committed enough to the sport to be good at it is to buy a more expensive bike, because a more expensive bike will make them a better rider. Nevermind the fact that these people are DANGEROUS because they have no idea how to ride alone let alone in groups.
A couple of times a year I get up the courage to show up at one of these things in a distant hope that things have changed. But, it only seems to get worse.
Horseback riding and flying are also both more expensive than cycling. Golf is actually pretty cheap to get into. You can get a decent used set of clubs pretty cheap, usually from someone who took up the sport thinking they could be Tiger Woods after a week, bought he most expensive clubs out there, and then discovered that becoming proficient in a skill take a lot of hard work and effort, and gave up to do something easier.