There is no evidence Babu has ever presented against being rigged that passed the muster in 2013 and 2017. What I have seen are academic work done that flag anomalies in few areas of NEP.
2013 - was okayed by all observers, media, supreme court - as being free and fair. Not perfect. Possibly UhuRuto rig NEP votes to cross 50 percent.
2017 - supreme court found no evidence of rigging - just a messed up transmission system. They hanged IEBC for procedural mess - but nobody has presented evidence showing Uhuru rigged in this area or that area.
Moi used to rig but did a clean job. Kibaki was basically a coup - he kidnapped ROS - appointed commissioners to alter results - everyone saw it - observers, medias, kenyans - and it was brazen and outrageous. It lead to PEV.
Kibaki is luckly because US supported him after Raila crossed the redline by entering MOU with hardline muslim accused of terror and promised to not enact anti-terror law.
If Raila had not done that - Kibaki would have been forced to the wall by US and EU jointly - and Kenyans - and of course Raila is a coward - who gave up his stolen victory.
If 2007 was to be pulled in 2022 - you can bet Ruto will fight to the bitter end - and that would be huge civil war.
The fact that Babu sold himself short is no argument against rigging. He just succumbed to UhuRuto's pennies and his own vanity