That is how stupid costly AWS is and 99% of people using AWS are wasting money like there is now tomorrow.
You don't even need to use Hetzner, I'm actually quite surprised they are spending 2k on DB. For the env isolation i understand they need ec2 but...
it shouldn't cost anywhere that amount, for instance I have 3 million users on a $40/month digital ocean VPS with just Django + Postgres and I have far more reads and writes.
for env isolation you could spin up a $5/month VPS and shut it down when idle
Why do you think that is? Are that many people that dumb or are there other reasons they use managed cloud?