Do you impose the penalty on every monster that does not have PC class levels or is of a race that grants proficiency in the PHB? If yes, that's really odd. If no, clearly that proficiency applies to non-PCs as well.
You mean the proficiencies they are clearly given by their statblocks? You realize the monster math bakes that into them right?
But there is no "halfling" statblock in the monster manual. A halfling is not naturally proficient in those weapons. So if you want to make halflings proficient in all these weapons, you need to provide an explanation as to why they are proficient.
So, what gives Halflings their proficiency with these weapons? DM Fiat?
And they are SIMPLE weapons that apply to COMMONERS. Is specifically says commoners, not PCs. Commoners. And not commoners of a race lucky enough to have proficiency like an Elf. Jeebus man.
"Clubs, maces and other weapons like what are found in the hands of commoners"
Not that, it says that commoners use them, not that they are proficient. You will not find a commoner statblock with a mace proficiency, or a quarterstaff proficiency, or a spear proficiency. So, it is likely that they were refering to the type of weapons, not that they were giving commoners proficiency with them.
No company is perfect. It's reasonable to think that they made the mistake of keeping shortbow in there. Most likely, at some point there were going to make shortbow a martial weapon and it got moved. It's crystal clear from both the PHB specifying commoners, which PCs are not and the MM which gives races with no proficiencies listed the use of weapons, that proficiency with simple weapons is for pretty much everyone.
No, this is you making up rules because you don't like the real rules. Assuming that shortbows were a mistake and not the rules as written, when they have had six years to errata it, and never did, is either arrogant or facetious.
Additionally, looks at this list.
Daggers, Darts, slings, Quarterstaff, Light Crossbows.
That list is the sorcerer weapon proficiency list. Here is a list of every single simple weapon. I'll bold the sorcerers gains.
Club,
Dagger, Greatclub, handaxe, Javelin, Light Hammer, Mace,
Quarterstaff, Sickle, Spear,
Light Crossbow,
Dart, Shortbow,
Sling.
So, in your theory that everyone in the world is supposed to get Simple Weapon proficiencies, and them not getting that is a mistake that the Devs have simply not bothered to fix for the past six years, how do you explain someone who has only 5 of the 14 simple weapons. Or, nearly 1/3 of the weapons. Was that a mistake too? Was the Druid a mistake? They have 9 out of 14.
So, elves, dwarves (who were given light hammers and handaxes), wizards, sorcerers and druids were all misprinted, and are actually supposed to have all simply weapons as a proficiency... or the rules don't give you proficiency for no reason, and you need to have a reason to have it.
I think I'm going to lean on major sections of the rules being correct and not mistakes that have gone unnoticed for years.
You mean other than the specific rebuttals. But hey, continue to deny reality.
The very specific "that's absurd" ah yes, truly it was a great point that clearly communicated why using the rules as written as inappropriate.
Oh wait.
It very heavily implies it.
Actually, it does the exact opposite, only making sense if there are villages without retired adventurers. You know, like I keep saying.
That's yet another Strawman. You just can't help yourself with those, can you?
What was it you just said in this post? Oh yeah
"that proficiency with simple weapons is for pretty much everyone."
What was my text you called a Strawman?
"Text does not give every single person in the world proficiency with simple weapons"
Hmmm... everyone, proficiency , simple weapons... yeah that looks like literally your point. Are you saying your own argument was a strawman this whole time?