Again, for the umpteenth time, THIS IS NOT ABOUT MY PERSONAL PREFERENCES. I DO NOT DISLIKE HALFLINGS. I HAVE NO REAL OPINION ABOUT HALFLINGS POSITIVE OR NEGATIVE. Good grief, how many times do you have to keep getting corrected? But, to answer your question, yes, I have zero problems with something getting tossed if it doesn't make the cut. Sure, I'm disappointed that warlords still haven't made any headway in 5e. And, my absolute favorite class, the 3e binder, got murdered behind the barn years ago. But, well, there's not much I can really do about it is there? At the end of the day, it's the same argument - they weren't popular enough to gain enough traction to be included in 5e. For a number of reasons.
But, as far as druids go, let's unpack that shall we? Sure, Druids are bottom of the list. But, not by much. Other than fighters and rogues, all classes fall within similar ranges. And, even fighters and rogues aren't THAT much more popular. Sure, fighters come in at 13% and rogues at 11%, but, since the spread is only 6-13%, that's a pretty even balance.
OTOH, halflings aren't even in the same league. Excluding humans, elves and dwarves are both double digit popularity. Tieflings and Dragonborn are both close to double digit. The spread is far, far greater. And, druids are called out as one of the "core 4" classes. Apples and oranges.