Steve:Pardon my French but that’s complete bull****. People used the “restricted field of view” argument when de Haven and company started pushing for shoulder harnesses. It was a facile argument then and remains so in this setting.
If you have seriously restricted movement from the lateral restraints, you have them pulled too tight. If it’s properly adjusted you should have enough slack in them to look almost completely left and right. They are designed to restrict head rotation when a driver’s head is as far forward as the device allows. The drivers have to be able to look left and right just like a pilot does and for the same reason (to avoid hitting anything).
If you think that the field of view that a NASCAR driver has is adequate for an airplane pilot, then please do not fly VFR.