No, for sensible analysts, it was UKR likely can hold out RU for as long as it can be supplied (porous land borders), and it has bodies to throw at grinder. The timer extends everytime UKR gets new supplies, tries to reconstitute new forces, with said supplies.
TW scenario is one where blockaded island cannot be supplied under motivated PRC siege, and the mere act of blockading (starvation), throws basically everyone into the grinder with a timer on survival especialy in an island far beyond it's natural carrying capacity. It's just acknowledging that historically if a sieger can maintain a siege, the sieged either capitulates or starves to death. PRC sieging TW directly off her coast with modern tech is all things considered, relative to the logistics historic distant sieges, easy mode.