[3np]

Only "objectively" by your priorities. The fact that metal heats up your legs is also a benefit (e.g. better heat transmission = better performance and component lifetime in the same environment).

As someone else noted, "strength" in material is not one-dimensional. Carbon plastic is still way more conducive to cracking, for one.

Ergo, there is no "objectively better" choice between metal/plastic/carbon in the general case, it comes down to preferences, priorities and requirements.