I've no idea. I'm sure plenty of folk do, I've never met anyone that cares about the Olympics though. I've never claimed to speak on behalf of all Scots, either. But watching both club and international football on a weekly basis up here gives me some insight into how the majority of football fans might think.
Re: your point about the SFA 'denying' younger players the 'opportunity' to become an Olympian, the point is that young players up here can see the bigger picture.
FIFA may seize on Scots participation in a GB Olympic team to end the independent status of the four home nations, in the future and insist on a GB team in the Euros and World Cup. It's not an issue under Blatter (much against his 'better judgement', he's been forced to back down on this one) but I confidently predict future administrators will seek to make an issue of it. I can categorically state that no one in Scotland, barring a few Rangers die-hards, would support such a team, and indeed would be actively hostile to it. I imagine most proper England fans would be, too.
Risk the independent future of the Scottish team for some diddy youth tournament no one will remember a month after it's finished? No thanks.