The alternative being “not riding”?
I think you’re on the wrong forum.
Try this site: iworryytoomuchaboutmyhealth.com
Seriously, there is not a unicyclist alive who has not suffered with significant crotch discomfort all or most of the time since starting to ride a unicycle.
The reality of unicycling is that discomfort is a primary limiting factor in the time we can spend in the saddle. Most of us are more concerned about falling and breaking a wrist than about calcified masses in their testes.
All men will get prostate cancer, it isn’t a question of “if”, it is a question of “when”.
Your best bet is to have regular physicals and do self exams.
If you ride a uni and it hurts, when the the pain is bad enough, get on the forum and see if folks have ideas about how to decrease discomfort.
There are a number of threads concerning crotch discomfort and what riders have done to improve comfort, maybe THAT would be a good data set to develop; i.e. solutions to discomfort that could cause a health problem.
I think your overthinking this issue, verging on paranoia.
You’re a new rider, it takes time to overcome the discomfort. A you learn to ride, your increasing skills will help with body position, and your increasing strength and stamina will lead to longer, more satisfying rides. Go ride and leave your worries behind.
And since we’re talking about unicycle related crotch pain:
People, listen up, if you are tired of having your testes smashed together, if you wish a better seat could be “made”, then that time has arrived and the means to improve your seat are in your hands, literally.
Take a look at this thread, it is the best answer for relieving crotch discomfort while riding: The world's second best unicycle seat (for tightwads)
After flattening my uni seats I can ride further, I no longer have crotch “abrasion” issues, I have “space” to wear bike shorts, and I am having mre fun riding 