I'm one of those people. I have over 250 different SPS in my systems, many of which were over $100 and some of which were over $1000. The most I've paid for 1 frag is $2000 for an RRC Rainbow Splice when they first arrived in the US in May of 2019. I have since sold over $30,000 worth of Rainbow Splice Frags in 3 years. Here is what I paid 2K for:
Many of the corals in this tank started as $300+ frags:
Everyone has different feelings on what they prefer to spend their money on. Some like expensive cars, some like the RC hobby, some like ladies of the night and blow. I like corals.