DND_Reborn
The High Aldwin
Let’s get a grip on things! (so to speak...)
Ha-ha! Good one!
Reading intently, keep it coming!

Let’s get a grip on things! (so to speak...)
My assertion is that arguments for a ruling in the game based on realism are not very good ones. They might work at your table with your players, if you have to justify a ruling (which you shouldn't have to do if you're being consistent). It will rarely if ever work in forum discussions.
I think it’s a mistake to assume that a larger creature would have advantage, simply because the smaller creature is has the potential to be more nimble. The larger creature probably already has a significant bonus to their strength, simply by being large.