I watched the same interview on Tw. I guess that was Kawhi not throwing them under the buss...If he would have said the injury was from last season everyone on media would question Spurs medical staff at that moment.
In 2015 about his hand..."One of the doctors said it's the first time he's ever seen an injury like this" In 2018 about his quad..."They've never seen an injury like this"
If they didn't know what it was they could misdeagnose it. Even Pop admitted the doctors had to change the treatment after the first weeks of Spurs training camp.
Kawhi could feel frustrated after getting the same "have never seen it" response from Spurs doctors.
But again, it's not an irreconcilable issue.