There is no aggeessivity in my question.

I assembled many model kits and it never occurred to call myself a builder. Model kit builder concieve the kits and or create parts out of raw material, epoxy putty and/or 3d printing.

Similarly a bicycle builder will solder/bond individual tubes to build custom frame and fork, possibly custom stem and/or racks. A brand that source frame builts in Asia will but mount the ready made part will say "assembled in <insert the country>.

Maybe I am picky with semantics but it strikes me as arrangant to call ourself builders when we just pick up and assemble parts.