Let's Encrypt is not part of our friends here.

DNS is easy for yourself, but if you host it for others (1000+ of people) and it needs to have all domains in the world, then it becomes a struggle.

Let's Encrypt is a non-profit that defeated the certificate cartel. The main thing you get from using HTTP without it is bad security.

DNS can answer thousands of queries per second on a Raspberry Pi and crazy numbers on a single piece of old server hardware that costs less than $500.