Expensive luxury boats are basically just fuckmobiles for sugardaddies to take their gold digging sugarbabies out to sea for some dicking. They literally serve no other practical purpose outside rich men using them as a means to fuck vain women.
If rich guys want to spend their money that way, by all means go right ahead. But lets not pretend it's anything other than what it clearly is. Many companies who build these things even intentionally design them to have a spot somewhere on the boat that is both discreet and relaxing so that they can easily have sex.
Don't believe me? Look at this shit yourself:
https://www.fraseryachts.com/en/new-yachts-for-sale/Nearly half of these things have a tinted window section with a casting couch pre-installed. Top fucking JeJ.