Yes fishing is a perfect example tp4 - as someone with no experience you may think as I do you just need a rod so it will be cheap to try, but when you think a little you realise you need waterproof footwear and a coat you don't mind getting smelly, a net, a decent knife, some scales. Then you research and (guessing from here on) find out expensive bendy rods are better for beginners and fish are more blind to blue tinted line...
Before you know it you've spent a fortune, not to mention the practicalities like transporting said equipment.
Makes me wonder how anyone starts anything...