You sound like the guy in high school that went after the popular girls with loose gaping holes because collectively they are considered attractive and popular by everyone, yet you pass up the cute quiet girl with glasses that wears a sweater that ends up being smoking hot and a great personality, and didn't have 50 dicks pounding her brains out.
all coaches need a starting point. All great coaches were brand new at one point, no names buried on a staff. Sometimes a "name" or what looks good "on paper" ends up being old and rotten. We have a lot of new, young, unproven blood that could end up developing into quite the innovative staff we need.
I think we should give Rhule the benefit of the doubt, and see if he can start and build his own dynasty off of his own risks and intuitions.
Other guys being Matt LaFleur (who you noted, went 14-4 and had a postseason bye) and Zac Taylor who, yes, went 2-14, but for a team that was clearly tanking and now has the #1 pick and in line to select who could be the next generational talent at QB? Who else is there? And to be fair, all of these guys, McVay included, are actually part of the Shanahan coaching tree.
edit: And if you include Kliff Kingsbury, he's also an NFL HC rookie that was working with a rookie QB. Bottom line, if you're expecting anything more than 4-5 wins this coming year (especially if Cam is gone), you're expecting too much, and I'm willing to bet that'd be the case whether we hired a college HC or a veteran NFL coordinator. There is simply not enough talent on this team short-term.