Sam, you do not understand science. I don't know what else to say.
You say "model" and "theory" as if they were seperate things. You confuse the subjective feelings of scientists for the accounting of experimental variables. What, exactly, do you think the word "objective" means?
You seem to think that theories/models of nature are only valid under certain conditions. (if that were the case, they'd be tossed as models).
The fact that controlled experiments are done does not mean they have limited validity, only that the control of variables can help isolate what you are examining.
Some of what you say is true:
Correct.
I guess we just think in different ways.