Why I will not vote for William Ruto come 2022

I caused drama during a function in my county headquarters (Murang'a) last month, when I said, that I won't vote for William Ruto in 2022. Someone reminded me that we agreed as a community to back Ruto after Uhuru’s term expires in 2022 and if we start disowning the agreement this early, we might lose the Kalenjin support in 2017. I replied that I don't remember signing such an agreement and I will not be party to such crappy arrangement where a few leaders decide who the community should vote for. I have a brain and I will use it to decide. 

So basically, are we voting for Ruto because we believe he can make a good president or because Kenyatta and his people have promised him our votes? Will Kalenjins vote for Uhuru in 2017 because they believe in him or because they expect reciprocation in 2022? I personally don't believe William Ruto is presidential and won't promise him my vote just because I want his people to support Uhuru’s second term, when I am not even convinced that Uhuru deserves a second term. I refuse not to use my brain.