We can imagine examples of weird and uncomfortable compliments that are in some way related to the demographics of the recipient - like someone attempting to flirt by telling a French man "Your voice is way too sexy for you to be a founder" or a well-built black man "You look way too athletic to be a founder". These seem about as socially inept as the "way too hot" example and strike me as reasonable analogues. But the examples in the post I replied to higher in this chain are nothing like this.
If you look at the example the parent poster gave, that's exactly the implication. "Oh, you're way too hot to be a startup founder, what are you doing here?"
The 'too xyz to be here' comment is typically made by people that aren't in a position to judge, possibly for a number of reasons.
Let's give another example of a complement that really isn't:
"Wow, it's nice to see some black people at this event for once". It's a positive statement, sure, but it's not an appropriate comment to make.
Can you understand how this belittles people?
That's exactly the point: if you can switch some group labels around and make an insult, then don't use the version involving gender.