Well, we know that now...:)
So, what is reality, if not the ideas that represent facts we think we know?
Are the ideas less real than the uncertain facts they describe?
Is an old model any less real than a new one?
And now back to our regularly scheduled programming...
"Newton's laws" are IDEAS, AKA models of reality that exist inside the human mind in an attempt to explain and predict behaviors observed in the "real" World. His laws aren't "real", since ideas aren't physical "things".
Ideas aren't physical things, ok. However, his ideas were/are real enough. Thinking differently won't soften the fall.
They are based on subjective perceptions that MAY be shared, and even accepted as a shared "reality", but whether that represents what they actually ARE is a philosophical debate well beyond the limits of this forum.
Not subjective as per above. There is no doubt of their "shared reality", it's real enough for everyone and everything Newton's laws are a fact within the context of their application, classical physics at the macro level, applicable to all. The fact we have ideas that supercedes this now is expected.