Yup, I don't buy it either. I believe some schools play dirtier games than others involving boosters or wealthy individuals close to the program. But OSU could have had the best classes in both 2017 and 2018 if it had larger classes.
Add Robinson, Knighton, and Phillips (and delete Miyan) to the 2020 OSU class and the class would come in at 309.30. Georgia is at 309.05, Bama at 310.39, and Clemson at 311.90. That'd be about as close to a 4-way tie for the top class as you could see. OSU went for more 3* players than I expect they will in future classes now that Day has a proven season under his belt. Just looking at 2021 and where the OSU class is at, the Buckeyes may be the favorite for the top class right now.