I'm not arguing that. I'm arguing the other side of his job is neglected / not in his locker: selling players for value.
There's zero evidence he hasn't got that in his locker though?
We got £15m for Klaassen. I liked Davy, but after the disastrous season last year could we expect more? We have got loan fees for other players, one of which (Besic) would have been a permanent transfer for more than we paid for him initially if not for image rights?
We got £10m for Funes Mori.
Other than that we haven't had any players to sell/that we've needed to sell?
So you must be getting your theory from his days at PSV, well let's see.
All prices are Euros.
In his first season, 2010-11 PSV sold two players who were in the last year of their contracts. That was Carlos Salcido (aged 30, a defender) for 1.6m to Fulham and Ibrahim Afellay (24) for 2m to Barcelona (Afellay had 6 months left on his deal at the time).
2011/12, they signed Strootman and Mertens for a combined fee of 13m, and Wijnaldum for 5m. Those purchases were offset by the 15m sale of Balasz Dzsudzsak and 3m sale of Francisco Rodriguez.
2012/13 a lot of free transfers both in and out.
In 2013/14, there was a big squad turnaround. A combined 11m was spent on six players, including Adam Maher (a prestigious young talent), Bruma (who has been a stalwart there IIRC), Zoet (current no.1 and Netherlands international) and Santiago Arias (now at Atletico Madrid).
They sold Mertens for 9.5m, having signed him for approx 6m in the deal with Strootman, who in turn went for 19m (6m more than the COMBINED fee paid for him and Mertens). So, 28.5m compared to 13m layout - I'd say that's good value.
They also got 4m for Erik Pieters, 3.5m for Ola Toivonen, and 10m for Jeremain Lens.
Memphis Depay was the next big sale, 30m to Manchester United in 2014. Not good value? They also sold Andreas Pereira to United, while bringing in Luuk de Jong (6m), and Andres Guardado (loan).
2015/16 - Wijnaldum sold for 17m having signed for 5m.
2016/17 - Sold Narsingh for 6m, having initially signed on a free.
2017/18 - Sold Guardado after he had helped them move back to the top in Netherlands, supposed fee of 2.5m for a 32-yr-old. Jetro Willems went for 7m. Locadia went to Brighton for 16m. Davy Propper went for 6m. Hector Moreno went for 8m.