Many of my friends have motor boats, in ground swimming pools, airplanes, take exotic vacations, have luxury vehicles. These things cost many tens of thousands. I have one hobby and a $3K bike. It’s all I want right now. If I did choose to spend $10K on a bike that would last several years, be my only hobby and give me many many hours of enjoyment, I wouldn’t consider it extreme and I wouldn’t apologize for not giving it to charity.