I have little interest in football, too. (Even though I was named after a Nottingham Forest player. Or perhaps that is why ...)
Wembley Stadium is an important cultural and national landmark - whatever one thinks of football and other sporting activities. The prospect of it being for sale just reinforces the impression that Britain is an open market available to anyone who wants to bid. As far as the government is concerned, it seems, inward cash flow is fine - no matter what its purpose. Britain is up for sale to the highest bidder.
A few years ago, Cadburys was aquired by Krapp Kraft. Last year ARM holdings, the world's leading semiconductor intellectual property supplier, was acquired by a Japanese company. For both of these companies it means that decisions about the companies' futures are now made somewhere else. The list is long - Heathrow Airport is owned by a Spanish company.
The bid for Wembley appears to have been made by an American entrepreneur who seems to think that it could be a centre for American football. Huh!
Wembley Stadium was rebuilt a few years ago - I believe that the British government actually made a significant contribution to the cost. So, why should the FA simply pocket the cash from this sale?