Not in this day and age. A nation ought to identify its biggest asset and focus on it while ensuring value addition. Kenya is blessed with all matter of raw wealth; how we utilize it is our blessing or curse. Case in point, we produce one of the World's best coffee and tea yet export it as is. To support my point, Qatar, Bahrain, and even Brunei, considered the World's wealthiest nations in terms of GDP per capita don't engage in agriculture.
You may have a point but for kenya, agriculture is our main thing as we diversify into other areas.
Those countries mentioned apart from Brunei, are all deserts.
To destroy your point, those desert countries are making effort in the agri field, when it comes to dairy and daily consumption veggies. Alot is imported but alot is also grown local.
We on the other hand, have thrived on coffee, tea, flowers, cotton, pyrethrum, sisal, sugar, salt.... All in the past.
Our so called honorable people, destroyed these pillars of our economy.