Spellthief / Klepto Abuse? Or can we just please restrict items by class?

Another example of a support item being "abused" in the top lane:

https://www.riftherald.com/lol-gameplay/2019/2/11/18220527/top-lane-spellthiefs-edge-kleptomancy

Honestly, as a support main, I hope this keeps happening, because I am so bored with the fact that I have no impactful build choices anymore. Literally I'm building the same 3 items every game, without regard to who I'm laning against or who on the enemy team.

The reason this happens, is that (outside of the shield buffing items) Riot can't make any decent items for the support class because they have to also be balanced around the fact that a solo laner might use it. This needs to stop because:

A) Nobody likes point and click shields/heals being the only answer for protecting carries B) Nobody wants to see a return to the Ardent Censer meta

The axis of balance in the support role is almost entirely dependent on how strong shield casters happen to be at that time. And the only reason for that, is that they are the only type of support champions that have a dedicated group of items that directly effect their power, and only their power. No solo laner is going to pick up Redemption, Zekes, Ardent, etc.

I'm so tired of the fact that my item groups are constantly effected by the case of "well what if a solo laner gets it?" I'm never going to buy a Tiamat so that's fine, but my items always have to be balanced against the case that someone takes it Top or Mid lane.

Having open access to every item makes support items so difficult to balance. Can we just keep the items restricted to Marksman, Bruiser, Support, etc? It's not like this isn't a regular practice as it is. Things like tank Ekko and tank Viktor aren't allowed, so why even bother offering them the choice items you will intentionally make sub-par for them?