I would disagree with him
never having been a superstar (he did have that calibre about him, at least in club football, back about a decade ago), but those days are long past him. Also, he's no Jesus, he's no Elvis, he's no answer (A cookie to whoever figures out what I just referenced
) to what Spurs need. If we needed someone to do the things GK is asking that he do, we'd be better off adding him to the coaching staff. Besides, when one player gets all the attention on a team, after a while the teammates start to get a little disgruntled towards said player. It happens in every sport, not just football.
The media circus would undoubtedly be detrimental to the team's performance, as well, especially if he gets himself into the least bit of trouble. The UK tabloids are a bunch of parasites, and trust me, after what I saw the Vancouver Canucks (my local NHL ice hockey team) go through after the Bertuzzi fiasco back in 2004, I can say that if anything close happened with Beckham on the delivering end of it, it would be ten times worse if not more. The press hounded everything he did for years after the fact, and this not only caused Bertuzzi, and the Canucks on the whole, to underperform, but it also negatively affected Team Canada's performance in Torino 2006.
For me, the potential upside is far outweighed by the potential downside.