The Vikings have next to no good young talent. Outside of Addison, all the good 'young' players they have were drafted before KAM got here. And based on you're average NFL lifespan of 3.3 years, that means they are on borrowed time.
The draft is EXTREMELY important. Yes, most of the picks fail, which is why the AVERAGE career for these guys is low, but you have to hit on one or two a year and the Vikings have not been doing that. And no, guys like Ed Ingram (not a KAM pick BTW) do not count as 'hitting' on one, he was awful by every evaluation, and is still awful. You absolutely should be able to get one starter per draft in year one and have two or three starters per draft by year two. You need to build the core of your team through the draft, you can't just go out and fill it in free agency every year or eventually you'll be filling it with quantity, not quality. Like the Texans did with Ed Ingram.
Honestly, this is a weird argument. I'm sure even the Vikings and KAM would acknowledge that the draft is very important and that they desperately need to improve in this area. It's OK to admit his drafting has been poor and still like the guy. I do.