If you don't think you are missing something then don't dwell on it.

Depending on what shape your body was in when you started riding and how it changes from hopefully getting more fit (health wise) then your perceptions of what does and doesn't bother you might change over time.

As you get into longer and longer times for each ride, you might find something that starts to bother you. Or if you watch your performance numbers and think that maybe you aren't getting the most out of your current fit. Might simply be a desire to get more aero comfortably, or maybe you can get your body in a better position to put more power into the cranks.

But as long as you are comfortable doing what you do, then a pro bike fit might leave you wondering what it did for you. You really need to know in your head what you are wanting out of a fit when you go for one. Power? Comfort? Something else?