Because the marginal value is higher. Wander around on Mars for 10 minutes and bring back some samples and you are guaranteed to discover something new and important - same can't be said for wandering around my local park.
Some people use the PSL to determine what is a valid domain name and what isn't. This is dangerous, particularly in these days where new gTLDs are arriving at a rapid pace, if your software does not regularly receive PSL updates, because it will erroneously think new gTLDs are not valid.
Whilst I broadly agree with your sentiments, you should also get out more, and open your eyes. Whilst not knowing Rothko doesn't imply your insular views, life can become more interesting if you don't close off alternative experiences.