oh wow, i really liked reading your words, i so completely understood! and agreed!

I have never tried NILF, but, i can imagine, how NUTZ my dog would be without his rich and rewarding and busy toy play. I shudder to imagine. See, thing is, boredom for my dog, is painful, and he is MUCH MUCH harder to manage if he is bored. It is just the reverse of NILF for my dog.
LIke you, my dog rarely gets treats for breathing,
Buddy does earn all treats, in part, because he is soo limited on how much he can eat per day.
If he was one of those dogs that can eat and eat and eat and eat and never gain a pound, WA-LA! THEN i might consider giving him bits of food for being cute.
but otherwise, i sort of "have to"
use each bit of treats, (and sometimes, part of his meals) for training. Plus, this is noooooo strain on my dog, he LOVES doing tricks

, he LOVES having something ANYTHING to
do.
but yes, i so agree, my love is unconditional for my dog, and my dog needs lots of love. Never crossed my mind to withhold it. ever.
and everything i have to offer him is unconditional. ESPECIALLY TOYS, oh wow.
I do all i can to keep his toy life interesting, i hide 2/3 of his toys and rotate most of his toys around, to keep him interested
in toys he hasn't seen for a while. Overtime, he stops playing with some of his nonfavorite toys, so i swap
those ones out from his bag of hidden toys, to keep it "fresh"
(the giant teddy bear, has been beside Buddy, since day 1, though). His favorite toys are
always in his toy area, 24/7.
He gets new toys regularly. I buy bags of them at goodwill.
He learns the names of his toys, and i praise him for toy play, and do all i can to ENCOURAGE it, as it looks therapeutic to me.
But, i did use forward progress as a reward for not pulling on leashes, etc. So maybe that falls into "conditional" access, not sure. But, on the other hand, i am pretty darn good to give my dog a chance to run full speed off leash every day, to be a free dog running free.