To me, the term "traditional bowhunter" is the antithesis of a bowhunter who uses a compound bow or a crossbow. It's the bow itself, that is what sets the whole of bowhunters into descriptive subsets.
As far as other technology, go ahead and use what you like to use. At least for now, this is still the land of the free. However, I think you may come to the conclusion that less is more and that your "hunt" with a recurve or longbow is better without all the gadgets, which can remove the human element from the hunt.
If others take issue with your rangefinder, ask if they use such things as GPS, Thinsulate, hand warmers, eye glasses, binoculars, takedown bows, carbon or aluminum arrows, flashlights, portable chairs, portable treestands, rubber boots, trail cams, etc.
Like it or not, we're all in the modern world. We are discussing this online, after all. But like at the end of Star Wars when Luke Skywalker turned off his targeting computer right before firing the shot that blew up the Death Star, I think many would benefit from turning off some of the gadgets that others see as must have. The most effective tool a hunter has is the one between his ears. More hunters would benefit on using that tool and relying less on other tools that they think they must have.
I'm not against gadgets. I owned my own sporting goods store for over a decade and worked at several other outdoor companies including an Orvis endorsed store and Cabela's. I'm merely suggesting that if one decides to use a "traditional bow", that they may want to try and stay in that general realm as much as possible. That is merely my opinion.
I've found that traditional bowhunters may have less "stuff" overall, but when they make a purchase, it's often of higher or much higher quality and price.
Now, I use a rangefinder for my rifle hunting. I use it all the time. But for my short range traditional bowhunting, I shoot deer from about 10 steps to 15 steps away. For me, anything past my preset trail setups is too far and my brain can calculate that faster and with less movement that using a rangefinder.