The problem is finding anyone who is shoving 100% here, a lot of people like myself don't shove the very bottom of their range as form of range balancing. If i can get people to go "wow he passed a marginal atc spot" it allows me to keep peoples ranges a bit tighter than they should be.
I would also suggest that your read on this guy is nowhere near strong enough to "know" he is shoving atc, in these spots a bit of interpolation is required. He is shoving wide but you don't know whether his "wide" is 60% or 100% and if it is 60% you have made a massive mistake. So there is always going to be a margin of error in your reads and you should adjust accordingly.
pretty sure this is invaluable when playing regs regularly
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