Yes, his Venus conjunct Jupiter in capricorn is linked to laziness.
I think one of his biggest and most important things to focus on in his chart is the location of Mars. When looking at Mars, you're looking at someone's motivations and passions. When you say that he isn't really doing much of anything and is doing this rather selfishly it's quite fitting for his Mars placement.
So.. Mars in the 12th house suppresses, blocks, or confuses someone regarding their physical or motivational desires. He has a lot that he wants to do in this life, but it's very hard to find and do what he actually wants. If his Mars was in the first house he would be a go-getter for everything, but in the 12th, it's almost as though people with this placement take actions that undermine everything they want.
His Mars is in Aquarius as well. Not to say that Mars in Aquarius could be linked to his unmotivation; that's definitely a 12th house thing. But Mars in Aquarius people are kind of oblivious to anger or intense emotions. Aquarius is an intellectual and light sign; mars is a heavy planet, so Mars in Aquarius people have a kind of cool, or have a "calm" tone to any oppositions they meet; like what you described. Like, I've never seen an Aquarius Mars get mad unless it's something on a humanitarian level. Moon in Libra could also indicate this--wanting logical balance over emotions.
Lastly, his Mars is exactly square Pluto. Mars in the 12th can indicate some kind of sexual trauma and so can Mars square Pluto. This only indicates; I can't say for sure. But your friend seems to be a really sexual person, especially having Moon in the 8th house. Also, Mars in Pluto are pretty secretive regarding their actions and aren't upfront with the things they do. Maybe he is telling you that he has no interest or appears to not have any direction or motivation in life, when in fact, he absolutely does. Especially with these planets being square between the 9th and 12th houses.. To me that indicates that his actions are strongly motivated by some kind of spiritual or belief system that isn't put out in the open for him and everyone else to see.
But then again, I could be completely wrong
Scorpios in general, which he is, are never really understood in this world anyway. And the majority of scorpios are quite focused on what they want from life.
The fact that all his planets are located in the upper half of his chart makes him pretty, I don't know, oblivious? to anything regarding his own selfish needs. All his energy (planets) are expressed outwards neglecting his personal life.
Hope I helped