The phrase "all too simplistic" is correct and usable in written English.
It can be used to describe an idea or explanation that is overly simple and fails to capture the complexity of a situation.
Example: "While the solution seems appealing, it is all too simplistic to address the underlying issues we face."
Alternatives: "overly simplistic" or "too simplistic".
The setup is long and intricate, but, though Ferrara's ambitious plans may be admirable, his bland, unimaginative images do little to realize them, and his personal view of Christian love seems all too simplistic: Heaven on earth seems to lie somewhere between Norman Rockwell and weekend retreats at a feminist shaman's commune.
I think they're all too simplistic," says Brinkema.
"I think that a lot of the psychoanalytic models of straight identification like the male gaze or the female gaze...I think they're all too simplistic," says Brinkema.
They all seem too simplistic to me.
Some intelligence and national security officials worry that the Saudi crown prince's argument about how to resolve conflict in the Middle East — that his country is the chief hope for peace and Iran is the root of all strife — is too simplistic.
But I've found all those solutions to be too simplistic, silly, or just inapplicable to my world.
While predicting response to therapy based on analysis of single-molecular markers remains an attractive proposition, this approach is probably too simplistic and "all-inclusive" cell-based procedures such as the Comet assay represent a realistic way forward.
We combined it with three shared values that we came to call the three P's: "passion for the customer, our people add value, and performance leadership". Some people in the company thought all of this was far too simplistic, but to most of us, simplicity was its strength.
As with many an argument, this alone is too simplistic — we all know, for example, the importance of everyday technology availability in the current spurt of innovative, high-growth businesses.
While HP model is too simplistic, considering all 20 amino acids is computationally intractable.
