Our range here should be polarised, ie have more hands like a8o than kq sand thus makes or lre flop sizing very bad. We want fold equity with our range ore flop and we want him to shove/fold this 12345 or something would be a more appropriate sizing with our range.
I'm not sure why you're surprised at what he could turn up with here and you're very wrong that he won't have ax here. He will be opening a2o+ and folding 0# to your 3b size