Loadbalancers are useful for more than balancing load, you can distribute traffic to the different endpoints on them. They're fairly good at it.
80x is on traffic costs alone, I've detailed that above; 80$ for 1TB of traffic on AWS, not including incoming traffic costs, 1$ for 1TB of traffic on Hetzner, incoming traffic is free.
A 16core/64GB instance (m5.4xlarge) on AWS costs 360$ monthly, a tiny bit cheaper if you buy upfront. I pay 50$ a month for 16core/128GB/2TB. The 2TB storage would have to be paid extra on AWS. The m5a.4xlarge is a tad cheaper at 320$ monthly cost, again not counting for storage and bandwidth costs. I get double the RAM and lots of storage for less than 30% of the cost.
So on traffic, it's 80x cheaper, the instance is barely 30% the cost of AWS, and that's not counting the storage costs, which are very high on AWS compared to other providers (OVH, B2). And that only gets cheaper once you buy volume.
Of course the number 80-100x doesn't apply to me personally since I'm running a fairly low-scale operation but this all starts to stack up once you go large. A colo is even cheaper than any of these options since you only pay for power used and for hardware once.