Why must they do labor to earn money? If I mow lawns for a summer, then invest in a lawn mower which I then lease out to someone else to mow lawns, am I not entitled to the lease money because I'm not doing the labor?

Investing the fruits of one's labor is widely considered a human right, and is even explicitly listed in the Declaration of Human Rights. And hedging ones investments with gold, silver, bonds or crypto is not an unreasonable thing to do.

Striking it rich on doge or whatever is still meaningfully different than investing in rentals.