That is entirely possible. Everyone is justified in having their own opinions. You've got yours, and I've mine. I feel that it's entirely within reason that a Light Armor class might find use in not wearing hardened leather armor about town.
I'd like my Sorcerer PC to have a +2 item bonus to AC for wearing Agile Leather Armor, but unfortunately, Agile Armor is limited to Chain, Scale, and Plate.
For the purpose of wearing no armor about town, heavy armor wearers have the Imposter's Armor option. That item option was explicitly designed for them. Light armor wearers have the Summoned Armor or Hat of Disguise options (as do Heavy armor wearers as well).
If that's the purpose, then there are already options for the Light armor wearers.
If the purpose is to change the best disguise and AC item for this particular thing so that a certain class of PCs can now get it, although they didn't meet the requirements previously, then I don't see the need.
To me, this seems like a cheap way to get an automatic clothing disguise and a fairly decent AC while "out of armor" for that class of PCs that are already heavily skilled in Bluff disguise. Most of the heavy armor wearers (with the possibility of Paladins) are lousy at Bluff, so the designers gave them an out.
From a game balance perspective, the third level heavy armor guys go from AC 20 with +1 Imposter's Plate to AC 11 (plus possible Dex or Int, maybe as high as AC 12 or 13). During a surprise round and possibly part of round one, they are at a major disadvantage.
The same third level light armor guy would go from AC 18 with +1 Imposter's Leather to AC 15. The drop is not nearly as severe.
I think there is a game balance reason that Imposter's Armor is only for the Heavy armor wearers.