I have never had a problem with driving big cars, in our case, Volvo and SAAB estate cars, and I am quite sure I could handle a big 4x4 or SUV if required to.
What is it women find so intimidating. Theey all have power steering and adjustable seats and at 5' 4'', now shrunk to 5' 2'', they cause me no problems. I have driven them towing a trailer and the roof rack stacked.
I think too many women feel nervous and then chicken out of trying because there is no loss of face if you do so, while men, nervous or not, have a go and find it not difficult to master a bigger car, anything rather than wimp out and admit they cannot hack it.