The point of the SI system is not that one meter is "better" than one foot. It's that we picked one subjective point of reference and then made almost all the other units related to that in a straightforward way and scaled with a common set of prefixes.

In everyday life, the metric system offers no big benefit, except for consistency for international standards and trade. But if you're doing anything engineering-related, your life is simpler if you don't need conversion factors to move between liters, meters, joules, watts, amperes, volts, ohms, and so on.

And FWIW, even to the extent that US engineers sometimes use inches and Fahrenheit, almost everything else they do is anchored to SI.