No no no no no,,,,,,,,,,, here is a very easy way to put you in a simplicity way to look at things and to always put you very close with any VV Mod. always add 2v or 2.2v to whatever ohm Atty your using. This will ( most of the time ) put you on to a perfect match up of ohm's vs Voltage combo to use. Example = 2.0 ohm Atty +2 = 4v vape or 4.2v vape with a 2ohm Atty. !
2.4 ohm Atty +2v 4.4v or 4.6v vape this is for lower voltage
vaping. It can vary a bit higher with say a 3.5ohm Atty and you can go north of the 5.7v to upwards of 6v. Bottom line this is just a very simple way of judging your starting voltage when you put on a new Atty and if you have a VV mod you can always adjust and dial it in of course to where you like it but if you use the +2 or + 2.2 it will always put you dam close to where you want to be. This is just a simple way of doing it and it usually works quit well.
You also wont lower the variety of stuff, I have used a 2.2ohm Atty at 5v and have had a very blissful vaping experience at times. It's all subjective and whatever you like and you feel your sweet spot is, different juices act differently at different voltages and some juice taste better much hotter and some much cooler, it is whatever you happen to enjoy, and again the +2v or +2.2v over your ohms will always get you close ! ohm's law does not always come into play