Experience does matter.
And experience is defined as:
(1) holding political office
(2) having accomplished things
If you only define experience as having held political office, then I would question the premise of your argument. There’s a lot more to life that counts as experience than just holding political office.
No matter how you wish to define experience, experience is self evident. If you believe that business experience is more important than political experience that is your call. However, to say that experience in a particular profession is a bad thing is just silly.