Food for thought: There are bikes that are offered 'one size fits most': traditional American balloon tire cruisers, folding bikes, BMX bikes, even the high-performance machines from Alex Moulton. The 'compact' frame design pioneered by Giant is successfully offered in far fewer sizes than traditional road bikes.
Think most of those bikes are for riding maybe 5 miles at most so don't think fit is really too inportant give or take 2 cm either way but on a road bike when you . Want to ride 50 miles or more I think is is more important to dial your fit in as best is possible