Explain me how it makes sense, please Google the issue with Chrome, read the user issues and then figureout why this things are how they are. Don't waste your time if you don't want to be changed your mind though, the short story is;
1 users need this option, someone with a touch screen was having issue closing the tabs and he was quiting the browser
2 the code exist(and is enabled on Mac)
3 Firefox,Vivalid and other browsers have this option
4 not all Chrome/Chromium users are button licking designers or low RAM idiots that an option somewhere in about:config is too much
5 there was no UX study to support hiding this option.
Sure, I will not use Chromium but you can't stop me complain when I see stupid decision made by designers or developers to satisfy their ego, so I will NOT stop complaining, Chromium UX is bad, GNOME UX is bad, you can
1 accept the criticism, yes sometimes designers/leaders are bad, see Apple reverting the keyboard changes after years of fanboys pretending Apple is perfect and users are the problem
2 ignore the criticism, probably you have better things to do then defending some random designer
3 copy/paste some shit excuse like "only 5% users use that so removing is fine" where the numbers are fake , and the rule applies selectively to only whatever the big ego designer decides to remove (other excuses are : is too much work, is too hard for our developers to maintain it, use a third party insecure extension/patch, don't use that, etc.