AD Ahri isn't very good. A true ADC is better cos their skills scale with AD. Also, alot of them have autoattack modifiers or attack speed buffs, both which Ahri lack. All Ahri can do is autoattack people. Her skills don't scale, and she gets no useful buffs from her kit to complement her autoattacks. Spirit rush just isn't enough to justify using her as an ADC. You're kinda wasting her potential using her as an ADC, she scales infinitely better with AP. If you like dashes and skillshots so much just play Ezreal.
Go look at most of the ADCs and you'll find wat makes them viable as an ADC are their kits either offering bonus attack speed, %hp dmg, or some other form of autoattack buffs like true damage on hit (Trist, Ez, Vayne to name a few). Alot of them also have a dash/blink/movement speed boost. Only Ashe kinda lacks these (not including her passive), and it's probably because she's one of the first ADCs~
I'd not fault them for thinking you're trolling, especially since alot of the new ADCs are so good and pretty safe to use (Jinx, Lucian, Sivir). Jinx has more CC than Ahri, and an execute ult. Lucian has a good dash and long range damaging ult... Sivir has spellshield and a movement speed boost. You should try to learn them~~