Why is Riot trying to get rid of all attack speed slows?

In the past years, Riot has been removing attack speed slows from lots of champions. Between Lee Sin and Gragas, many champions no longer have ways to slow enemies attack speed. Some of those removals were actually necessary, such as in case of Lee Sin, and recently, Darius (since he would be even more obnoxious if he could still slow enemy attack speed). However, we currently have very few ways to slow enemy's attack speed. The few champions who still have attack speed debuffs are but none of them are currently popular. The only items with attack speed slow that we have were both nerfed and do not see nearly as much play as they used to: Randuin's Omen, for example, due to its nerfs, is currently seeing much less play, and people are using instead of it because it has higher effective HP against physical damage, but this item does not slow the enemy's attack speed.

It seems like Riot is trying to get rid of every attack speed debuff. I don't know their reasons for doing that, but attack speed slows are currently very useful, especially in a meta where many of the most popular champions rely on attack speed, examples including - In addition, I doubt how attack speed debuffs would be toxic when despite being crippling for some champions, they are completely useless against others - example including casters like .