If riot wants ap items to be as "Gold efficient as AD items" then why no Starting AP/per level?

for me it when i play an ap champ i feel like im being punished for building ap. like it feels like if i was a lux with ad scaling and i never auto attacked i would be better off. i didnt feel like this as much when ap items were actually gold efficient, what i mean is an ad character gets like 120 free ad or something on a lot of much better scalings plus their autos are obviously worth something. and the fact that as an ap champ you basically fall off after 3rd/4th item until you get 3800 gold harder then a full tank lee sin at 50 mins. or of course, you can literally build death cap as your 2nd or 3rd item. fun not having the much needed zhonyas. either i wish riot would legit make all ap items as they were when NLR was 80 ap. or i wish riot would give mages free gold per level = to the amount of free gold ad people make off of their scaling per level. which would be like 200+ gold per level. which is ridiculous.