It really is boomer talk, and your Fox example goes to show how flawed the logic is - the same Spurs' medical team which gave Fox the green-light last season, is also handling Castle's thumb case here and possibly holding him out over it.
At this point it really should be wide and common sense that a three-word description of any given injury is far too little for outsider fans to make judgements on. Literally no medical professional would ever make a diagnosis based on only the injury name/type, yet many fans feel entitled to judge whether a given injury "should" keep a player out or not, or how long to be sat based on a Google search of "[X injury] recovery timeline".......... It's ridiculous, beyond narcissistic, and certainly boomer-esque.