Why should we sign Winston to a 2 to 3 year deal instead long term

Please stop with the 2 to 3 year deals. Make it a 6yr deal averaging 27 million a year. Hear is the reason why. You can structure the contract so it is only guaranteed for 2 to 3 years. If he stops improving you cut him after 2 to 3 years. No cap hit. If he is lighting it up you have a bargin in year 4, 5, 6. When starting QBs are making 45 million a year.