If the fitter doesn’t have Flightscope or Trackman and can’t tell you what the setup that gives you the best dispersion is (you shouldn’t have to ask) then don’t touch them
Unless they are old school and do dispersion by eye - but dispersion (left right short long - correct) is critical
So are you suggesting an each way bet when getting fitted, Weeti ?
I think that a good fitter should look at several area's to produce a comprehensive overview when fitting you.
The computer figures gained from a launch monitor are just one relevant part and equate to about 1/3 of the total fitting.
Assessing your current equipment and where you are going with your swing and game is also an important part to take into consideration.
Being able to have a demo club setup to the fitters suggested new specs for you to try is paramount. Then you can go to the practice tee or onto the course and trial the demo club versus your own gear and accurately work out if the fitters ideas are correct and better to move forward in a purchase !