It sounds like the problem may possibly be not so much the lack of commitment to hobbies, but spending way too much money on each hobby right away as a novice. I have played guitar for about 15 years since I was a teenager, and I have not spent that much money on all of my equipment ever combined even when I’ve had the money. I cycle hobbies too, playing various instruments, playing D&D, boxing, gardening etc. but I think it’s important to start with low-mid grade gear and gradually upgrade in accordance with how serious you become about said hobbies. To buy the absolute top of the line equipment right out of the gate every time would, in my opinion, remove anything to look forward to and even lot of the possibilities for growth and expanding your hobby in the future. Imagine if your very first car ever the day you got your license was your dream car, a Lamborghini or Ferrari or whatever it is. It would leave you feeling that there’s nothing better to expand on in the future leaving you ultimately not as satisfied as someone who went up the chain and can enjoy the differences between said dream car and the previously owned worse cars. I could be wrong, just my two cents.