Why most engineer said that they can be an architect but architect cannot be an engineer?

It is true, but kind of mean to make an issue of it.
Engineers must know how to draw up a workable plan, but also be able to include motion in the process. Energy source must be represented.
Power and motion make the difference.

Frank Lloyd Wright was an incredible architect, but not much of an engineer. Too many of his houses had a lot of problems, like leaky roofs and ground movement,

Engineers are not necessarily creative types or artists like some architects. Sure, engineers they can build while architects probably only know enough of engineering stuff not to stupidly design something truly ridiculous and impossible to build.

Architects imagine and design and create art while engineers are there to build it according to the design. To make it real and to make it work and last.

It requires an engineer, not an architect, to apply an existing prototype to a new building. If you want someone to come up with something stylishly novel then it would be best to first hire an architect before calling on an engineer.

Architects make things pretty, engineers make things work and work safely. An engineer with a good eye can do what an architect does. The reverse is not true unless the architect is also a licensed engineer. Ideally they work together from the very start of a project.

Well, you should see the planning data that I get from some architects.
Mostly facades, with extremely rough floor plans where the walls end in the middle of a window.

I’ve never agreed with that assertion.

An architect has artistic skills and talents that aren’t easily mimicked. Here’s a 2006 house designed by an architect: https://66.media.tumblr.com/5230b74ef88e6c3a206c598549435f76/tumblr_inline_ocezk5MiRN1sppt0x_500.png Here’s the sort of disproportionate monstronsity that an engineer might create: https://chicagoagentmagazine.com/wp-content/uploads/2013/08/mcmansions-return-average-home-size-new-construction-census-bureau.jpg

@Love_my_doggie
Those are factors derived from cost cutting and client wishes.
I am routinely supplied with irredeemable trash by architects.

There is also the false notion that engineers are not creative. It takes quite a bit of creativity to solve the problems they face. There is no shortage of it either. Many creative people just don’t think they can do math or have never developed technical skills.

Good architects have to have a lot of engineering knowledge and presumably architectural engineers have some design knowledge. That doesn’t mean that the premise is correct; they are separate professions.

I am routinely supplied with irredeemable trash by architects.

Those are bad architects. The world has no shortage of incompetent lawyers, unskilled hairdressers, inept chefs, bungling accountants, careless physicians, amateurish interior decorators, etc., etc. etc. There’s plenty of room for architects that create garbage.

A good, or even decent, architect:

- Understands proportion. A building’s primary mass is well-defined, and the secondary masses are to-scale and complementary. The voids (doors, windows, and other openings) create attractive breaks and rhythm across the masses.

- Achieves balance. Whether a building is symmetrical or assymetrical, both haves get harmonious visual weight.

- Knows about patterns and flows. Continuation – does the eye naturally move along a horizontal or vertical path? Proximity – objects that are close together should complement each other. Similarity – common textures, colors, and features.

An architect doesn’t need to be especially creative or original, just adept with some most-fundamental principles.

And none of that matters, when that drives up costs and the contract goes to the lowest bidder.
That is how you, constantly, get cases, where right in the middle of beautiful Gründerzeit buildings, horrible trash like this gets built.
Because it is cheap.
And the best part is, according to an architect colleague of mine, University today teaches, that this concrete block crap is actually beautiful, and that it is the old styles of buildings that are ugly.

^^Both designs look ugly to me. Odd. : )