Why not have better early turret scaling?

I feel like turrets are pretty good super early. There should be opportunities to dive and get kills when people stay under turret despite a 4 man coming their way. However, it seems like turret threat is really weak after people hit level 5+ and players have a really really easy time to dive and ignore turrets even in 1v1 situations. Currently the bonus AD is +4 per minute until a total of 180 damage is reached for outers, +4 AD per minute for inners until 250, and +4 AD per minute for inhibs until 290. (inner and inhibs don't start scaling until 8 minutes in) I agree that buying armor and tanking it up needs to be an option later but lately chain vest alone can do it. So I just wanted to propose the idea that instead of +4 a minute why not +6 or +8 or at least let inners start building up at start of game like outer turrets. Let them reach some higher damage early to be a threat but still have them cap out so that players need an armor item or two before they can really dive without worry or some ability designed to drop/dodge turret aggro. They also have scaling armor too which might be something to look at as well as damage.