High RAM utilization is only good when your RAM is topped off with cache and buffer use. It's bad when it's all consumed by program data that forces the OS to swap other running application stuff to disk, especially if you're using several programs at once.
why would all the memory of chrome be in RAM and other programs not? I suppose there must be lots of swapped data there too. Doesn't crome have a separate sub? process for each tab with not much shared between tabs?
In looking for ways to free disk space on my SSD I find that the chrome ~Library/Cache can grow to insane proportions (5G?)