I'm just saying there's more to photography than technical perfection
Imo
truly great photography is all about technical perfection, although because we're organic creatures, true technical perfection (to us humans) actually means or is achieved by a hint of imperfection so the observer can feel the image is real, the technical skill or perfection of a seriously good photographer is to know when the image is too perfect, and the believable level of perfection will obviously vary depending on the genre of photography.
An example would be retouching skin, the best retouchers will retouch the skin perfectly and then deliberately leave a mole or some kind of flaw in the image to anchor it to reality.
Or it would be like a food photographer sprinkling crumbs on a plate of food, this imperfection makes the food appear more real and therefore more tasty.
So to say photography is not about technical perfection, just means your not taking into account all the parts of the equation, especially the parts related to human perception.
Obviously 99% of photography or photographers don't need to worry about such things as imperfection, as imperfection just happens on it's own for them whether they like it or not (obviously I include myself as such a fairly low ranking photographer).
Now with regards to your
friend, I'd say his portraits need a fair amount of work in achieving an engaging human/emotional aspect to them, but this isn't due to too much technical perfection, but actually too much imperfection all things considered, what I'm really saying is, he needs to spend some time looking at him self instead of his camera for a while, either to boost his confidence, as well as learn how to be aware of the vibes he transmits to others as they will likely be the vibes he receives back, which will show obviously in his imagery, it's true what they say, the camera looks both ways.
His landscape work however doesn't suffer from the above issues as he is not relying on interpersonal skill which is likely his Achilles heal (currently at least).
On the whole I'd say it's very good, however not the best I'v ever seen, but plenty good enough for me to enjoy looking through his work, even though I'm not 'that' into landscapes, and I would describe some of them as awe inspiring rather than 'lacking sole' although you could apply that term to his portraits I guess, but I'd have chosen different words if he was my friend.
As for some technically perfect works that ARE awe inspiring imo, you might want to browse the below guy's work he did with his 7D.
http://500px.com/alwaysbj182