Oofta
Legend
No, it isn't apples to oranges. The DM is telling you that your character is falling down (after being tripped by another character). Your DM is telling you that you cannot fight anymore.
In every case, the DM, through the mechanics, is telling you how your character is behaving, within the limits of the mechanics. You failed your check, so, you trip on the wire strung across the hallway and fall on your face, take D4 damage is the DM telling you how your character is behaving.
Now, you are saying you don't use Sanity, or Piety rules. Do you similarly not use inspiration or Ideals? Again, my point is, where is your cut off line? Is it ANY mechanics which impact the mental/emotional state of your character (besides flat our mind control of course)? And, if that's true, why is it acceptable that the DM can dictate your physical state? The DM can declare that you are now Exhausted, for example. So, any physical changes is perfectly fine, but, all mental ones are not?
I guess I'm just having a tough time seeing the difference. Your character is a high dexterity acrobat Rogue who routinely walks on tightropes, can climb a waterfall and has the reflexes of a cat. And I just made him look like a Keystone Kop because you failed a Perception check. How is that not impacting the portrayal of that character?
My PC determines their thoughts and actions. If I'm playing basketball, I decide to take a shot or pass. Do I decide if the ball goes into the hoop? No. Do I decide if a defender blocks the shot or steals the ball? Of course not. Same as my PC deciding to attack but not hitting.
I'd call this the flimsiest of strawmen, but you seem to be sincere. I am in control of my PC's thoughts and actions. I am not in control of consequences, results of my PC's thoughts or actions. Nor do I control the consequences of other creatures actions.
Apples and oranges.
P.S. I don't use inspiration for adhering to TIBF, alignment, or anything else. If I'm telling a player what their PC's internal thoughts and feelings are it's because they've been supernaturally influenced.