I find `overflow: scroll` is the worst (fair, it has it's uses), but I'm perplexed by seeing sites that has scrollbars on Windows when content absolutely perfec

I find `overflow: scroll` is the worst (fair, it has it's uses), but I'm perplexed by seeing sites that has scrollbars on Windows when content absolutely perfectly fits on the screen. Regularly do I visit sites that's infested with scrollbars, because every second element have this set - but it looks good on macOS, right?