This feels like a "if you don't like where you live just move to a bigger house in a better neighborhood" style response to work related software problems. I.e. many people don't get to choose to run whatever software they'd like to on their work machines, nor are they able to justify changing jobs over control of a bug in the file browser.
Ah, I get ya. To me, the hard to believe part is not how individual end users can't solve the problem/pressure Microsoft - it's how enterprise IT teams across the country pay massive licensing/support fees but core parts products like this have regular outstanding hanging bugs of the same family for extended periods over decades. You'd think there would have been enough pressure to make File Explorer more asynchronous by now, given Microsoft are talking about how they still tinker with the low level stuff from decades ago! I know even just mid sized individual companies I've work at have gotten custom patch requests/minor changes in before.
The tough part with (implied) multifaceted comments is nobody can just say things like that, they have to assume what meaning could still make sense to them (which is a dangerous game) or just not engage.