If I were to list Boise State's best 10 wins in their ~20 years or so of FBS play, the first 5 would probably be impressive for anyone, and then I'm afraid they'd fall off a cliff.
2001 - beat #8 Fresno St
2003 - beat #19 TCU
2006 - beat #7 Oklahoma
2008 - beat #17 Oregon
2009 - beat #16 Oregon, beat #3 TCU
2010 - beat #13 Va Tech, beat #20 Utah
2011 - beat #19 Georgia
2014 - beat #12 Arizona
2017 - beat #19 San Diego St
Okay, so 5 of the 11 wins over ranked teams are non-P5 programs. Those would be sort of ho-hum wins for an Alabama or Ohio State, right (except maybe TCU at #3). Anyways, look at what's missing. In the seasons skipped over, Boise either lost to any ranked teams they played, or more often, did not play even one ranked team.
Now let's look at 2016 Alabama, who lost to Clemson in the national championship game.
beat #20 USC
beat #19 Ole Miss
beat #16 Arkansas
beat #9 Tennessee
beat #6 Texas A&M
beat #15 LSU
beat #16 Auburn
beat #15 Florida
beat #4 Washington
The Tide had nearly as many wins over ranked teams in one season as Boise has had....ever. No, this Alabama season isn't the norm. No, Boise hasn't had as many opportunities, etc. That's all true. But fair or not, Boise hasn't amassed it's impressive winning percentage against anything resembling even an average schedule. Credit to them for their record, credit to them for moving up in conference quality through the years, but they're still not on even ground with the P5 programs.