So - you don't know why he stayed on after Cortese left but want me to believe your 'claims' of loyalty. Righto..What PR bullshit? It's a fact, Cortese resigned because he didn't have the backing of the trust/board. Cortese's ambitions were to keep the players, he with Poch and the original owner, Marcus Liebher, were to build on the squad that they had assembled, their ambitions were to have Southampton challenge for the league. This required further investment something that Katrine Liebher wasn't going to do, in fact they sold all their players.
To answer your question i have no idea, do you? I do know that There was endless speculation of Poch leaving, I also know that Cortese made a public plea through the press urging Poch to stay at Southampton, maybe just maybe he stayed in answer to Cortese's plea and chose to steady the ship? Poch has only ever spoken of great affection towards Southampton since his departure, despite their fans booing him when we meet.
Still waiting for you to back up your claims.................
To be honest - the above is immaterial - Poch will leave for a bigger club eventually - I see no shame in that. What's your problem anyway?