B/X Known World
It’s a really odd position to take. These things over here that are wildly unrealistic are good and fine and don’t talk about them...but those things...oh...those things over there that are wildly unrealistic are bad. It literally comes down to preference. Nothing more. “It breaks my suspension of disbelief” isn’t really an argument when the same game has a massive pile of things that also “break suspension of disbelief”. It’s a non-argument. “I don’t like it” is more accurate and less silly of a complaint. If you wanted any sense of “realism” whatsoever you wouldn’t be playing D&D. It’s like eating a cake then complaining you don’t like cake.I have to say, I really hate the "magical elf game" argument to explain away anything that doesn't make sense.
It’s heroic fantasy. Halflings can be just as strong as goliaths. There. Done. The list of things that just are and don’t have explanations in D&D is quite long.Unless there is a specific reason for it, even a fantasy world should follow real world rules. Now, those reasons can change a lot of stuff, but I still the reason needs to be stated.