I fail to see the logic in your reasoning.
Caitlyn is the ADC with the most range but it doesn't mean her kit should then come with underwhelming scaling.
Her trap is a staple for her lane control (as she is made for that, don't forget that nobody like bully in lane and caitlyn is a bully along with draven and lucian in some mu), it is what allow her to deal dmg (as her Q is normally a tool used to push and easy to avoid/mitigate the dmg if the ennemy isn't CC and without any other champ/minion/monster in front of them) and valorise her role of zoning as an ADC.
Having one trap mean loosing lane control or damage input for her, which then invalidate her early game power, which then only make her a "650 range ADC" and while having a big range is something huge, it clearly will make her feel terrible to play since you can't use your trap to zone the opponent and if you do, you can't have good pressure/dmg input by putting a trap under a CC opponent.
If you say "Well she will have to max W or make a choice", it would be very hypocritical and short sighted.
Not maxing Q mean loosing waveclear, which mean with her slow AS growth, cait will be easily pushed out. She then can't properly have an early advantage which hurt her as her scaling is about her being able to put pressure on lane.
It also mean she is way weaker in skirmish as she will be able to get, at best, one trap headshot and trap headshot is the core of her damage input. It mean caitlyn can't even get proper tool for dueling.
She will be reduced to hope her support is a bully, so it can put the pressure for her, or that the ennemy bot lane is very passive (either by having passive/weak early champ) so she can easily live her life or try to be a 'bully'.
This nerf would have to be compensated by a buff on the CD storing CD, which would make her blatantly stupid late with an even quicker stacking of traps. And if the nerf come without compensation, caitlyn will just feel awful in her scaling (and I don't mean like having a bad midgame, I mean it will just entirely feel shitty)
Caitlyn's trap is certainly the thing I can't even figure how people on the board can think it is 'unfair' to face, and I overall think this kind of topic is due more to caitlyn being hated as she is a bully than caitlyn's number of trap making it broken and unfair.
Also, I truly think it is an elo problem as caitlyn is very strong in very high elo (D1+) but people also know how to position themselves and punish every advance she make, they know how to put their own pressure and to work for their lane.
People here don't, so they keep saying "650 range" as an argument for why she is already so strong, but it is like saying "huge dmg" for brand and then saying he shouldn't have a stun or waveclear, or saying "high range" for lu and then saying her having CC or a shield is not necessary.
I don't know, caitlyn isn't about the trap by itself but about what the trap bring and it need numbers so it can be effective.