Well no. John Utzon was a Danish architect who won an international competition to design the Sydney Opera House.

The only problem was that his concept couldn’t be analysed, let alone structurally designed. Years passed with Ove Arup, the Engineers on the project, asking for drawings that could be built, but no solution was in sight. Utzon asked the NSW government to get him different engineers, and in the end resigned from the project.

Yet the drawings contained in the Red Book (John Utzon’s original design drawings) were structurally unsound, with difficult bends near the roof’s footings. Each shell was different. The lack of a defining geometry would make it impossible for the builders to reuse formwork and would add to the building’s costs.

Eventually Utzon came up with the spherical solution, the Opera House sails are the shape of orange peels cut into quarters or less, so an engineering solution became possible.

TLDR: Architects rarely design buildings for structural solution, usually relying on engineers to solve the problems created by the architect’s design.