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Almost certainly, but throw a toe strap between the tombstone of the rack and your the headtube if you're likely to overload the rack, will forget to check the bolts occasionally or just generally like to play it safe.
As @Skülly said, multiple mounting points will be better if the bolt did come loose rather than doubling up on the midfork eyelet. That said, if the bolt does go, your mudguard will be in the wheel too so who knows.
Don’t understand why you wouldn’t want all four stays, front ones down to eyelet near fork end, rear ones to mid-fork? Then your attatchment at the fork crown will be a lot less critical.
Think spotter missed your point about piggybacking at thr crown and thought you meant stays.