Considering how poorly GloFo has performed financially since AMD's spin off, I don't know how anyone here can even make a point that it would have been better to keep the fabs for AMD. The fab business is very difficult on its own as GloFo has struggled against TSMC.
Sorry Russian, this is a red herring here. Nobody but the dumbest fanboy says that keep the fabs was the best option. If AMD were to keep its fabs it would have to become a full fledged IDM like Intel, and not the cheapskate IDM they were before the spin off. AMD didn't develop its own node, it was always limited to licensing and implementing someone else's node, and on top of that there is the question of volumes, as they simply wouldn't be able to fill by themselves a 20nm fab, let alone a 14nm fab.
But that is no excuse for the kind of decisions AMD took in the last 10 years, like acquiring ATI by cashing out its former shareholders, proceeding with Bulldozer or tying itself to a subpar foundry partner for almost 20 years. Those decisions are simply inexcusable. It's not AMD hate, as you are trying to imply, to point out how asinine those decisions were.
Going into tablets and smartphones is also a failing strategy considering Intel flushed $4.2 billion in 2014 into the toilet trying to establish the Atom brand name while NV more or less brushed aside the smartphone and tablet market, instead focusing on the faster growing in-car tech business opportunities. Small companies like AMD can't afford to use their other profitable product lines to blow $4 billion as a possible gateway into new segments.
The very real reason Dirk Meyer was fired was because Bulldozer was to be an outright disaster that would implode the CPU division as it did, and in order to not destroy the market prospects, AMD threw that mobile smokescreen in the press. AMD lost the mobile bandwagon circa 2008.